Iverson, John B., and Geoffrey R. Smith. “Population Size and Sex Ratio of Snapping Turtles on the Crescent Lake National Wildlife Refuge”. Reptiles & Amphibians 17, no. 4 (December 1, 2010): 195–200. Accessed May 5, 2024. https://journals.ku.edu/reptilesandamphibians/article/view/16122.