Identification of Montana's Amphibians and Reptiles. 1995. Jim Reichel and Dennis Flath. Montana Outdoors. May/June 1995.

Coping With Snakes in Montana. 1997. James E. Knight. Montana State University Extension Service. MT9617.

Prevention and Control of Wildlife Damage. 1994. Cooperative Extension Division. Institute of Agriculture and Natural Resources. University of Nebraska, Lincoln, NE.

Wild Neighbors The Humane Approach to Living with Wildlife. 1997. John Hadidian, Guy Hodge and John Grandy, eds. The Humane Society of the United States. Washington, D.C