Main page for literature
An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
LockA locked padlock
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Bibliography and References (PDF Available Upon Request)
? By Subject
? By Author
? Endnote (requires endnote software to open this file)