American Composers Forum
http://www.composersforum.org/

Smithsonian Folkways
http://web2.si.edu/folkways/start.htm

Library of Congress
http://www.loc.gov/

The Mississippi: River of Song
http://www.pbs.org/riverofsong/

The Composers Datebook:
http://www.composersdatebook.org/

Country Music Hall of Fame Museum
http://www.country.com/hof/hof-f.html

The Symphony: An Interactive Guide
http://library.thinkquest.org/22673/index.html
 

Copland, Aaron. What to Listen for in Music. New York: Mentor Books, 1999.

Kingman, Daniel. American Music: A Panorama. New York: Schirmer Books, 1998.

Lornell, Kip. Introducing American Folk Music. New York: McGraw-Hill College, 1993.

Hitchcock, H. Wiley and Sadie, Stanley, eds. The New Grove Dictionary of American Music. New York: Macmillan Press, 1986