References
Reader's Digest Association. American Fascinating Indinan Heritage. Pleasantville, NY., 1991.
Willey, Gordon R. An Introduction to American Archaeology: Volume One, North and Middle America. Englewood Cliffs, NJ., 1966.
Kopper, Philip. The Smithsonian Book of North American Indians. Washington, DC., 1986.
Jennings, Jesse D. Ancient Native Americans. San Francisco, CA., 1978.