Meshaka WE, Jr, Wingert E, Humbert W, McCallum ML, Delis PR (2017) Gonadal cycles, clutch characteristics, and growth to sexual maturity in the American Toad, Anaxyrus americanus (Holbrook, 1836), from an Agricultural Belt in South-Central Pennsylvania. Pennyslvania Academy of Science 91:84 – 94. .

McCallum, M.L., C. Brooks, R. Mason, and S.E. Trauth. 2011. Growth, reproduction, and life span in Blanchard’s Cricket Frog (Acris blanchardi) with notes on the growth of the Northern Cricket Frog (Acris crepitans). Herpetology Notes 4:25-35.

Jones, L., D.R. Gossett, M.L. McCallum, and S.W. Banks. 2010. The antioxidant defense system in tadpoles of the American Bullfrog (Rana catesbeiana) exposed to Paraquat. Journal of Herpetology 44(2):222-228.

McCallum, M.L. and S.E. Trauth. 2004. Blanchard’s Cricket Frog in Nebraska and South Dakota. Prairie Naturalist 36(2):129-135.