| Authors(s) | Ernst, C. H., and R. W. Barbour. | 
| Year | 1972 | 
| Title | Turtles of the United States. Univ. Press Kentucky, Lexington. 347 pp. | 
| Authors(s) | Ernst, C. H., and R. W. Barbour. | 
| Year | 1972 | 
| Title | Turtles of the United States. Univ. Press Kentucky, Lexington. 347 pp. |