Inventory of Amphibians and Reptiles at Sagamore Hill National Historic SiteRobert P. Cook, David K. Brotherton, John L. Behler, National Park Service Staff, U. S. Department of the Interior Staff · First published 2010Open the Tome
The Audubon Society field guide to North American reptiles and amphibiansJohn L. Behler · First published 1979Open the Tome
