Field book of snakes of the United States and Canada - Schmidt, Karl Patterson. 1890-1957.; Davis, D. Dwight. (Delbert Dwight), 1908-1965. (New York : G. P. Putnam's Sons, 1941)
Includes bibliographical references and index.
Keywords: Snakes -- United States; Snakes -- Canada; Reptiles -- United States; Reptiles -- Canada