Bibliography:

Gila Monser. The Grolier Student Encyclopedia of Endangered Species. Connecticut: Grolier Co. V.6, 1995.

Kangaroo Rat. World Book Encyclopedia. Chicago: Scott Fetzer Co., v.11, 1993.

Ocelot. The Grolier Student Encyclopedia of Endangered Species. Connecticut: Grolier Co. V.7, 1995.

Prairie Dogs. http://www.desertusa.com/dec96/du_pdogs.html, Feb. 11, 1999.

Peregrin Falcon, The Grolier Student Encyclopedia of Endangerd Species. Connecticut: Grolier Co., V.5, 19995.

Patent, Dorothy Hinshaw. Prairie Dogs. New York: Houghton Mifflin Co., 1993.