Duellman, W. E. Amphibians and Reptiles of the Rainforests of Southern El Petén, Guatemala.
Chicago-čujuhus (17. p.)Duellman, William Edward. Amphibians and Reptiles of the Rainforests of Southern El Petén, Guatemala.
MLA-čujuhus (9. p.)Duellman, William Edward. Amphibians and Reptiles of the Rainforests of Southern El Petén, Guatemala.
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