Black, Jeffrey, and Gregory A. Sievert. 1989.
A Field Guide to Amphibians of Oklahoma
Oklahoma City: Oklahoma Department of Wildlife Conservation. 80 pp.


Sievert, Gregory A., and Lynnette M. Sievert. 1993.
A Field Guide to Reptiles of Oklahoma
2d ed. Oklahoma City: Oklahoma Department of Wildlife Conservation. 104 pp.


Sievert, Gregory A., and Lynnette M. Sievert. 2005.
A Field Guide to Oklahoma’s Amphibians and Reptiles
Oklahoma City: Oklahoma Department of Wildlife Conservation.
205 pp.




Webb, Robert G. 1969.
Reptiles of Oklahoma
Norman, OK: University of Oklahoma Press. 382 pp.