Books by Carl H. Ernst
Venomous Reptiles of the United States, Canada, and Northern Mexico: Crotalus (Volume 2)
Venomous reptiles of the United States, Canada, and northern Mexico
Synopsis of Helminths Endoparasitic in Snakes of the United States And Canada
Snakes in question
Venomous reptiles of North America
Snakes of eastern North Americ
Snakes of eastern North America
Turtles of the United States