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1 Allen, E. R. 1938. Notes on Wright's bullfrog, Rana heckscheri (Wright). Copeia 1938:50.
2 Allen, E. R., and W. T. Neill. 1954. Bullfrogs of Florida. Florida Wildlife 7(10):2021, 40.
3 Altig, R. 1972. Notes on the larvae and postmetamorphic tadpoles of four Hyla and three Rana with notes on tadpole color patterns. Journal of the Elisha Mitchell Scientific Society 88:113119.
4 Hansen, K. L. 1957. Movements, area of activity, and growth of Rana heckscheri. Copeia 1957:274277.
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