References
Attenborough, D. The Living Planet. Boston: Little Brown, and Co., 1984.
Brown, Lauren. Grasslands, The Audubon Society Nature Guides. New York: Alfred A. Knopt, Inc., 1985.
Hare, Tony (ed.). Habitats. New York: Macmillan, 1994.
Naar, Jon and Alex J. Naar. This Land is Your Land. New York: Harper Collins Publishers, Inc., 1993.
