Bibliography
Ruthven, A. G. 1919. The amphibians of the University of Michigan-Walker Expedition to British Guiana. Occasional Papers of the Museum of Zoology, University of Michigan 69: 1-14.
Ruthven, A. G. 1919. The amphibians of the University of Michigan-Walker Expedition to British Guiana. Occasional Papers of the Museum of Zoology, University of Michigan 69: 1-14.
