Stebbins, R. C. (2003). A field guide to western reptiles and amphibians; field marks of all species in western North America.
Citación estilo ChicagoStebbins, Robert C. A Field Guide to Western Reptiles and Amphibians; Field Marks of All Species in Western North America. 2003.
Cita MLAStebbins, Robert C. A Field Guide to Western Reptiles and Amphibians; Field Marks of All Species in Western North America. 2003.
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