List of resources used in the research of Missouri Endangered Animals
1. The Audubon Society Encyclopedia of Animal Life
1982 Clarkson N. Potter, Inc.
2. World Book Encyclopedia
1995 Fetzer
3. National Audubon Society Field Guide to North American Mammals
1997 Knopf
4. American Zoo and Aquarium Association
1997 The Wildlife Preservation Trust International
5. National Audubon Society Field Guide to North American Birds
1997 Knopf
6. Reptiles and Amphibians
1987 Western Publishing Company Inc.
7. Compton's Encyclopedia
1985 F. F. Compton Company
8. National Audubon Society Field Guide to North American Reptiles and Amphibians
1997 Knopf