1952
A taxonomic study of the ratsnakes, genus Elaphe. 4. A checklist of the American forms.
Occasional Papers of the Museum of Zoology University of Michigan 541: 1-12.
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Dowling, H.G. 1952 A taxonomic study of the ratsnakes, genus Elaphe. 4. A checklist of the American forms. Occasional Papers of the Museum of Zoology University of Michigan 541: 1-12. |