Hobart M. Smith - Science - 1978 - 160 pages
A guide to amphibian species of the North American continent, excluding Mexico, including range maps, identification keys and detailed color illustrations
Alan Tennant, Kenneth L. Krysko - Nature - 1997 - 257 pages
This is the only accurate reference with an identification photo for every species and subspecies listed. You'll find every indigenous snake species and subspecies in Florida ...