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United States Department of Agriculture

Agricultural Research Service

Related Topics

David D Douds
Molecular Characterization of Foodborne Pathogens Research
Microbiology

Phone: (215) 233-6421
Fax: (215) 233-6581
Room 0120

600 E MERMAID LN
ERRC
WYNDMOOR , PA 190388598

Projects
Function of Arbuscular Mycorrhizal Fungi in Organic and Conventional Agriculture (BRIDGE PROJECT)
Appropriated (D)
  Accession Number: 430834
Enhancement of Crop Growth Through Utilization of Arb
Specific Cooperative Agreement (S)
  Accession Number: 429514

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Mycorrhizal fungi collected from the rhizospheres around different olive cultivars vary in their ability to improve growth and polyphenol levels in leeks Reprint Icon -
Malik, N.S., Nunez, A., Mckeever, L., Kunta, M., Douds, D.D., Needleman, D.S. 2016. Mycorrhizal fungi collected from the rhizospheres around different olive cultivars vary in their ability to improve growth and polyphenol levels in leeks. Journal of Agricultural Science. 8:1-10.
Utilization of inoculum of AM fungi produced on-farm for the production of Solanum lycopersicum: a summary of 7 years of field trials on a conventional vegetable farm with high soil phosphorus Reprint Icon -
Douds, D.D., Lee, J., Mckeever, L., Ziegler-Ulsh, C., Ganser, S. 2016. Utilization of inoculum of AM fungi produced on-farm for the production of Solanum lycopersicum: a summary of 7 years of field trials on a conventional vegetable farm with high soil phosphorus. Scientia Horticulturae. 207:89-96.
Influence of host plants and soil diluents on arbuscular mycorrhizal fungus propagation for on-farm inoculum production using leaf litter compost and agrowastes -
Chaiyasen, A., Leardwiriyakool, C., Douds, D.D., Lumyong, S. 2016. Influence of host plants and soil diluents on arbuscular mycorrhizal fungus propagation for on-farm inoculum production using leaf litter compost and agrowastes. Biological Agriculture and Horticulture. DOI:org/10.1080/01448765.2016.1187670.
A method to minimize the time needed for formation of mycorrhizas in sweet corn seedlings for outplanting using AM fungus inoculum produced on-farm -
Douds, D.D., Wilson, D.O., Ziegler-Ulsh, C. 2016. A method to minimize the time needed for formation of mycorrhizas in sweet corn seedlings for outplanting using AM fungus inoculum produced on-farm. Scientia Horticulturae. 203:62-68.
Impacts of farm management upon arbuscular mycorrhizal fungi and production and utilization of inoculum -
Douds, D.D. 2015. Impacts of farm management upon arbuscular mycorrhizal fungi and production and utilization of inoculum. New England Vegetable and Fruit Conference Proceedings. p. 178-181.
Inoculation of sweet potatoes with AM fungi produced on-farm increases yield in high P soil Reprint Icon -
Douds, D.D., Lee, J., Shenk, J., Ganser, S. 2016. Inoculation of sweet potatoes with AM fungi produced on-farm increases yield in high P soil. Journal of Applied Horticulture. 17(3):171-175.
On-farm produced microbial soil inoculants effects on bread wheat (Triticum aestivum) production -
Englander, A., Douds, D.D., Mallory, E. 2015. On-farm produced microbial soil inoculants effects on bread wheat (Triticum aestivum) production. Biological Agriculture and Horticulture. 32(2):85-97
On-farm production and utilization of mycorrhizal fungus inoculum -
Douds, D.D., Wertheim, F.S. 2015. On-farm production and utilization of mycorrhizal fungus inoculum. Meeting Abstract. p. 1-2.
On-farm production of arbuscular mycorrhizal funus inoculum in compost and vermiculite mixtures: results of on-farm demonstrations and impact of compost microbiological quality -
Douds, D.D., Chaiyasen, A., Vasquez, L.R., Wertheim, F.S. 2014. On-farm production of arbuscular mycorrhizal funus inoculum in compost and vermiculite mixtures: results of on-farm demonstrations and impact of compost microbiological quality. Journal of the National Association County Agricultural Agents. http://www.nacaa.com/journal/index.php?jid=444.
Influence of mycorrhizal fungi on fate of E. coli 0157:H7 in soil and Salmonella in soil and internalization into romaine lettuce plants -
Nicholoson, A.M., Gurtler, J., Bailey, R., Niemira, B.A., Douds, D.D. 2015. Influence of mycorrhizal fungi on fate of E. coli 0157:H7 in soil and Salmonella in soil and internalization into romaine lettuce plants. International Journal of Food Microbiology. 192:95-102.
Effect of biochar soil-amendments on Allium porrum growth, arbuscular mycorrhizal fungus colonization -
Han, Y., Douds, D.D., Boateng, A.A. 2015. Effect of biochar soil-amendments on Allium porrum growth, arbuscular mycorrhizal fungus colonization. Journal of Plant Nutrition. DOI:org/10.1080/01904167.2015.1089903.
Pelletized biochar as a carrier for AM fungi in the on-farm system of inoculum production in compost and vermiculite mixtures Reprint Icon -
Douds, D.D., Lee, J., Uknalis, J., Boateng, A.A., Ziegler-Ulsh, C. 2014. Pelletized biochar as a carrier for AM fungi in the on-farm system of inoculum production in compost and vermiculite mixtures. Compost Science and Utilization. 22(4):253-262.
Evaluating the potential of mycorrhizal fungi to boost yields in field grown leeks -
Wertheim, F.S., Douds, D.D., Handley, D.T., Hutton, M. 2014. Evaluating the potential of mycorrhizal fungi to boost yields in field grown leeks. Journal of the National Association County Agricultural Agents. http://www.nacaa.com/journal/index.php?jid=281.
Effects of pyrolysis char from various feed stocks on survivability of Salmonella enterica and E. coli 0157:H7 in agriculture soils -
Take advantage of mycorrhizal fungi for improved soil fertility and plant health -
Douds, D.D. 2014. Take advantage of mycorrhizal fungi for improved soil fertility and plant health. Meeting Abstract. pp. 4-5.
Inactivation of E.coli 0157:H7 in cultivable soil by fast and slow pyrolysis-generated biochars Reprint Icon -
Gurtler, J., Boateng, A.A., Han, Y.H., Douds, D.D. 2014. Inactivation of E.coli 0157:H7 in cultivable soil by fast and slow pyrolysis-generated biochars. Foodborne Pathogens and Disease. 11:215-223.
Survival of Salmonella, Escherichia coli 0157:H7, non-0157 shiga toxin producing E.coli, and potential surrogate bacteria in crop soil as affected by the addition of fast pyrolysis-generated switchgrass biochar -
Gurtler, J., Boateng, A.A., Douds, D.D., Bailey, R. 2013. Survival of Salmonella, Escherichia coli 0157:H7, non-0157 shiga toxin producing E.coli, and potential surrogate bacteria in crop soil as affected by the addition of fast pyrolysis-generated switchgrass biochar. Meeting Abstract. IAFP Annual Meeting, Charlotte, NC., July 28-31, 2013.Volume 1, Page 1.
Production of AM fungus colonized seedlings under organic management; suitablity of hydrolyzed fish vs. blood meal as options for N addition Reprint Icon -
Douds, D.D., Lee, J., Mitchell, R., Ziegler-Ulsh, C. 2013. Production of AM fungus colonized seedlings under organic management; suitablity of hydrolyzed fish vs. blood meal as options for N addition. Biological Agriculture and Horticulture. 29(3):186-196.
Survival of Salmonella and E.coli O157:H7 in soil and translocation into leek (allium porrum) as influenced by mycorrhizal fungi -
Gurtler, J., Douds, D.D., Dirks, B.A., Quinlan, J.J., Nicholson, A., Phillips, J.G., Niemira, B.A. 2013. Survival of Salmonella and E.coli O157:H7 in soil and translocation into leek (allium porrum) as influenced by mycorrhizal fungi. Applied and Environmental Microbiology. 79:1813-1820.
Utilization of inoculum of AM fungi produced on-farm for the production of Capsicum annuum: a summary of 7 years of field trials on a conventional vegetable farm -
Douds, D.D., Lee, J., Rogers, L., Lohman, M.E., Pinzon, N., Ganser, S. 2012. Utilization of inoculum of AM fungi produced on-farm for the production of Capsicum annuum: a summary of 7 years of field trials on a conventional vegetable farm. Biological Agriculture and Horticulture. 28:129-145.
Influence of mycorrhizal fungi (glomus intraradices) on survival of Salmonella and E.coli 0157:H7 in soil and translocation into romaine lettuce roots and shoot -
Gurtler, J., Nicholson, A., Douds, D.D., Niemira, B.A. 2012. Influence of mycorrhizal fungi (glomus intraradices) on survival of Salmonella and E.coli 0157:H7 in soil and translocation into romaine lettuce roots and shoot. Meeting Abstract. International Association of Food Protection Annual Meeting, Providence. Rhode Island., July 2012.
Inactivation of E.coli 0157:H7 in crop soil by amending with fast and slow pryolysis-generated biochars -
Gurtler, J., Boateng, A.A., Douds, D.D. 2012. Inactivation of E.coli 0157:H7 in crop soil by amending with fast and slow pryolysis-generated biochars. Meeting Abstract., IAFP Meeting, Providence, Rhode Island, July 22-25,2012.,Volume 1, Page 1.
The contribution of arbusclar mycorrhizal fungi to the success or failure of agricultural practices -
Douds, D.D., Seidel, R. 2012. The contribution of arbusclar mycorrhizal fungi to the success or failure of agricultural practices. In: Edwards, C.A., Cheeke, T., Coleman, D., Wall, D., editors. Microbial ecology in sustainable Agroecosystems. Boca Raton, FL: Taylor Francis Group. p. 133-152.
Fall cover cropping can increase arbuscular mycorrhizae in soils supporting intensive agricultural production -
Lehman, R.M., Taheri, W.I., Osborne, S.L., Buyer, J.S., Douds, D.D. 2012. Fall cover cropping can increase arbuscular mycorrhizae in soils supporting intensive agricultural production. Applied Soil Ecology. 61:300-304. doi:10.1016/j.apsoil.2011.11.008.
Frequent cultivation prior to planting to prevent weed competition results in an opportunity for the use of arbuscular mycorrhizal fungus inoculum -
Douds, D.D., Nagahashi, G., Shenk, J.E. 2011. Frequent cultivation prior to planting to prevent weed competition results in an opportunity for the use of arbuscular mycorrhizal fungus inoculum. Renewable Agriculture and Food Systems. 27:251-255.
On-farm production and utilization of arbusclar mycorrhizal fungus inoculum -
Douds, D.D., Lee, J., Rogers, L. 2011. On-farm production and utilization of arbusclar mycorrhizal fungus inoculum. Meeting Abstract. 1:1.
Influence of mycorrhizal fungi on survival of salmonella and E.coli O157:H7 in soil and translocation into allium porrum roots and stem -
Gurtler, J., Douds, D.D., Dirks, B.P., Quinlan, J.J., Niemira, B.A. 2011. Influence of mycorrhizal fungi on survival of salmonella and E.coli O157:H7 in soil and translocation into allium porrum roots and stem. International Association for Food Protection Annual Meeting, Milwaukee, Wisconsin, July 31 - August 3, 2011., Volume 1, P. 1.
Identification of some diterpenoids and hydroxy fatty acids from carrot root cell walls that stimulate the presymbiotic hyphal growth of AM fungi -
Strahan, G.D., Nagahashi, G., Douds, D.D. 2011. Identification of some diterpenoids and hydroxy fatty acids from carrot root cell walls that stimulate the presymbiotic hyphal growth of AM fungi. Biophysical Society. 1:1.
The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi -
Nagahashi, G., Douds, D.D. 2011. The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi. Fungal Biology. 115:351-358.
On-farm AM fungus inoculum production: a complete how-to on-farm am fungus inoculum production -
Lohman, M., Ziegler, C., Douds, D.D. 2011. On-farm AM fungus inoculum production: a complete how-to on-farm am fungus inoculum production. Review Article. Available: http://www.rodaleinstitute.org/20101206.
Monitoring the decline in AM fungus populations and efficacy during a long term bare fallow -
Douds, D.D., Nagahashi, G., Wilson, D.O., Moyer, J. 2011. Monitoring the decline in AM fungus populations and efficacy during a long term bare fallow. Plant and Soil. 342:319-326.
Functional categories of root exudate components and their relevance to AM fungal growth -
Nagahashi, G., Douds, D.D., Yurdagul, F. 2010. Functional categories of root exudate components and their relevance to AM fungal growth. In: Koltai, H., Kapulnik, Y., editors. Arbuscular Mycorrhizas: Physiology and Function. p. 33-56.
Production of inoculum of indigenous AM fungi and options for diluents of compost for on-farm production of AM fungi -
Douds, D.D., Nagahashi, G., Hepperly, P.R. 2009. Production of inoculum of indigenous AM fungi and options for diluents of compost for on-farm production of AM fungi. Bioresource Technology. 101:2326-2330.
Exploring the role of arbuscular mycorrhizal fungi in carbon sequestration in agricultural soil, Part III -
Influence of farm management upon arbuscular mycorrhizal fungi -
Arbuscular Mycorrhizal Fungi and Glomalin Enhance Carbon Sequestration in Organic Farming Systems -
Nichols, K.A., Douds, D.D., Hepperly, P.R., Seidel, R. 2009. Arbuscular Mycorrhizal Fungi and Glomalin Enhance Carbon Sequestration in Organic Farming Systems. Meeting Abstract.
Germinating spores of glomus intraradices can use internal and exogenous nitrogen sources for a de novo biosynthesis of amino acids -
Jin, H., Pfeffer, P., Govindarajulu, M., Douds, D.D., Piotrowski, E.G., Nagahashi, G., Bucking, H., Lammers, P.J., Shachar-Hill, Y., Gachomo, E. 2009. Germinating spores of glomus intraradices can use internal and exogenous nitrogen sources for a de novo biosynthesis of amino acids. New Phytologist. 184:399-411.
Mid-Infrared and Near Infrared Spectral Properties of Mycorrhizal and Non-Mycorrhizal Root Cultures -
Calderon, F.J., Acosta Martinez, V., Douds, D.D., Reeves III, J.B., Vigil, M.F. 2009. Mid-Infrared and Near Infrared Spectral Properties of Mycorrhizal and Non-Mycorrhizal Root Cultures. Journal of Applied Spectroscopy. 63(5)494-500.
Utilization of inoculum produced on-farm for production of AM fungus colonized pepper and tomato seedlings under conventional management -
Douds, D.D. 2009. Utilization of inoculum produced on-farm for production of AM fungus colonized pepper and tomato seedlings under conventional management. Biological Agriculture and Horticulture. 26:353-364.
On-farm Production and Utilization of AM Fungus Inoculum -
Douds, D.D., Lee, J. 2008. On-farm Production and Utilization of AM Fungus Inoculum. eOrganic.http://www.extension.org.
Metabolite fingerprinting of exudates from carrot roots grown under phosphorus stress -
Inoculation of strawberries with AM fungi produced on-farm increased yield -
Douds, D.D., Nagahashi, G., Shenk, J.E., Demchak, K. 2009. Inoculation of strawberries with AM fungi produced on-farm increased yield. Biological Agriculture and Horticulture. 26:209-219.
Organic farming enhances soil carbon and its benefits -
Hepperly, P., Seidel, R., Pimentel, D., Hanson, J., Douds, D.D. 2007. Organic farming enhances soil carbon and its benefits. Soil Carbon Management, Economic, Environmental and Societal Benefits, Kimble, Rice, Read, Mooney, Follet, and Lal (Eds.) CRC Press. p.129-153.
Choosing a mixture ratio for the on-farm production of AM fungus inoculum in mixtures of compost and vermiculite -
Douds, D.D., Nagahashi, G., Reider, C., Hepperly, P. 2008. Choosing a mixture ratio for the on-farm production of AM fungus inoculum in mixtures of compost and vermiculite. Compost Science and Utilization. 16(1):52-60.
INOCULATION WITH AM FUNGI INCREASES THE YIELD OF POTATOES IN A HIGH P SOIL -
Douds, D.D., Nagahashi, G., Reider, C., Hepperly, P. 2007. Inoculation with am fungi increases the yield of potatoes in a high p soil. Biological Agriculture and Horticulture. 25:67-78.
SEPARATED COMPONENTS OF ROOT EXUDATES AND CYTOSOL STIMULATE DIFFERENT MORPHOLOGICALLY IDENTIFIABLE TYPES OF BRANCHING RESPONSES BY ARBUSCULAR MYCORRHIZAL FUNGI -
Nagahashi, G., Douds, D.D. 2007. Separated components of carrot root exudates are specifically exuded and stimulate two different types of hyphal branching responses of an arbuscular mycorrhizal fungus. Mycological Research. 111:487-492.
The Rodale Institute Farming Systems Trial 1981 to 2005: Long Term Analysis of Organic and Conventional Maize and Soybean Cropping Systems -
Hepperly, P.R., Douds, D.D., Seidel, R. 2006. The Rodale Institute Farming Systems Trial 1981 to 2005: Long Term Analysis of Organic and Conventional Maize and Soybean Cropping Systems. Long-Term Field Experiments in Organic Farming. p.15-31
NITROGEN TRANSFER IN ARBUSCULAR MYCORRHIZAL SYMBIOSIS -
Govindarajulu, M., Pfeffer, P.E., Jin, H., Abubaker, J., Douds, D.D., Allen, J.W., Bucking, H., Lammers, P.J., Shachar-Hill, Y. 2005. Nitrogen transfer in arbuscular mycorrhizal symbiosis. Nature Magazine. 435. pp. 819-823.
THE FORM OF NITROGEN STORED AND TRANSPORTED BY THE EXTRARADICAL HYPHAE OF AN ARBUSCULAR MYCORRHIZAL SYMBIOSIS -
Jin, H., Pfeffer, P.E., Douds, D.D., Piotrowski, E.G., Lammers, P.J., Shachar-Hill, Y. 2005. The form of nitrogen stored and transported by the extraradical hyphae of an arbuscular mycorrhizal symbiosis. New Phytologist. 435. pp. 819-823.
ENVIRONMENT, ENERGY AND ECONOMIC COMPARISONS OF ORGANIC AND CONVENTIONAL FARMING SYSTEMS -
Pimentel, D., Hanson, J., Seidel, R., Douds, D.D., Hepperly, P. 2005. Environment, energy and economic comparisons of organic and conventional farming systems. Bioscience. July 2005. v. 55. #7. pp. 573-582.
THE FORM OF NITROGEN STORED AND TRANSPORTED TO THE RI T-DNA CARROT ROOT BY THE EXTRADICAL HYPHAE OF AM FUNGI -
Jin, H., Pfeffer, P.E., Shachar-Hill, Y., Douds, D.D., Piotrowski, E.G., Lammers, P.J. 2004. The form of nitrogen stored and transported to the ri t-dna carrot root by the extradical hyphae of am fungi. Meeting Abstract #581.
BIDIRECTIONAL TRANSFER OF CARBON AND NITROGEN BETWEEN FUNGUS AND HOST IN THE ARBUSCULAR MYCORRHIZAL SYMBIOSIS -
Pfeffer, P.E., Douds, D.D., Schwartz, D.P., Govindarajulu, M., Bucking, W., Shachar-Hill, Y. 2004. Bidirectional transfer of carbon and nitrogen between fungus and host in the arbuscular mycorrhizal symbiosis. Meeting Abstract.
EFFECT OF HYDROPHILIC ZEIN FILMS ON THE GROWTH OF TOMATO PLANTS AND EVAPORATIVE WATER LOSS -
Parris, N., Douds, D.D., Dickey, L.C., Moreau, R.A., Phillips, J.G. 2004. Effect of hydrophilic zein films on the growth of tomato plants and evaporative water loss. Meeting Abstract.95th American Oil Chemists' Society Annual Meeting and Exposition, Cincinnati, Ohio, May 9-12, 2004. Book of Abstracts. p.123.
EFFECT OF HYDROPHILIC ZEIN FILMS ON THE GROWTH OF TOMATO PLANTS AND EVAPORATIVE WATER LOSS -
Parris, N., Douds, D.D., Dickey, L.C., Moreau, R.A., Phillips, J.G. 2004. Effect of hydrophilic zein films on the growth of tomato plants and evaporative water loss. Hort Science.39(6).p.1324-1326.
ON-FARM PRODUCTION OF AM FUNGUS INOCULUM IN COMPOST-VERMICULITE MIXTURES -
Douds, D.D., Nagahashi, G., Pfeffer, P.E., Reider, C., Kayser, W. 2005. On-farm production of am fungus inoculum in compost-vermiculite mixtures. Applied and Environmental Microbiology. 2005. p. 15-21.
ON-FARM PRODUCTION AND UTILIZATION OF MYCORRHIZAL FUNGUS INOCULUM -
Douds, D.D., Nagahashi, G., Pfeffer, P.E., Kayser, W.M., Reider, C. 2005. On-farm production and utilization of mycorrhizal fungus inoculum. Canadian Journal of Plant Science v.85. pp.15-21.
ROOT EXUDATE OF PMI TOMATO MUTANT M161 REDUCES AM FUNGAL PROLIFERATION IN VITRO -
DAVID-SCHWARTZ, R., GADKAR, V., NAGAHASHI, G., DOUDS, D.D., WININGER, S., KAPULNIK, Y. ROOT EXUDATE OF PMI TOMATO MUTANT M161 REDUCES AM FUNGAL PROLIFERATION IN VITRO. FEDERATION OF EUROPEAN MICROBIOLOGICAL SOCIETIES MICROBIOL LETTERS. v. 223. p. 193-198. 2003
ON-FARM PRODUCTION AND UTILIZATION OF MYCORRHIZAL FUNGUS INOCULA -
DOUDS, D.D., NAGAHASHI, G., PFEFFER, P.E., KAYSER, W., REIDER, C. ON-FARM PRODUCTION AND UTILIZATION OF MYCORRHIZAL FUNGUS INOCULA. INTERNATIONAL CONFERENCE ON MYCORRHIZA. 2003. ABSTRACT #147. P. 198.
EXPLORING THE BIDIRECTIONAL TRANSFER OF CARBON AND NITROGEN BETWEEN FUNGUS AND HOST IN THE ARBUSCULAR MYCORRHIZAL SYMBIOSIS -
PFEFFER, P.E., DOUDS, D.D., SCHWARTZ, D.P., GOVINDARAJULU, M., BUCKING, H., SHACHAR-HILL, Y. EXPLORING THE BIDIRECTIONAL TRANSFER OF CARBON AND NITROGEN BETWEEN FUNGUS AND HOST IN THE ARBUSCULAR MYCORRHIZAL SYMBIOSIS. INTERNATIONAL CONFERENCE ON MYCORRHIZA. 2003.
THE FUNGUS DOES NOT TRANSFER CARBON TO OR BETWEEN ROOTS IN AN ARBUSCULAR MYCORRHIZAL SYMBIOSIS -
Pfeffer, P.E., Douds, D.D., Schwartz, D.P., Govindarajulu, M., Shachar-Hill, Y. 2004. The fungus does not transfer carbon to or between roots in an arbuscular mycorrhizal symbiosis. New Phytologist. v. 163. pp.617-627.
CARBON EXPORT FROM ARBUSCULAR MYCORRHIZAL ROOTS INVOLVES THE TRANSLOCATION OF CARBOYHDRATE AS WELL AS LIPID -
BAGO, B., PFEFFER, P.E., ABUBAKER, J., JUN, J., ALLEN, J.W., BROUILLETTE, J.N., DOUDS, D.D., LAMMERS, P.J., SHACHAR-HILL, Y. CARBON EXPORT FROM ARBUSCULAR MYCORRHIZAL ROOTS INVOLVES THE TRANSLOCATION OF CARBOYHDRATE AS WELL AS LIPID. PLANT PHYSIOLOGY. 2003. v. 131. p. 1-12.
CONTRIBUTIONS OF ARBUSCULAR MYCORRHIZAS TO SOIL BIOLOGICAL FERTILITY -
Douds, D.D., Johnson, N.C. 2003. Contributions of arbuscular mycorrhizas to soil biological fertility. Book Chapter.
INOCULATION WITH MYCORRHIZAL FUNGI INREASES TEH YIELD OF GREEN PEPPERS IN A HIGH P SOIL -
DOUDS, D.D., REIDER, C. INOCULATION WITH MYCORRHIZAL FUNGI INREASES TEH YIELD OF GREEN PEPPERS IN A HIGH P SOIL. Biological Agriculture and Horticulture. v. 21. p. 91-102. 2003.
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Last Modified: 5/2/2016
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