BioStor
 | Notes on some reptiles and amphibians from Oregon, Idaho and Utah John Van Denburgh (1912) Proceedings of the California Academy of Sciences 3: 155-160 |
 | A monograph of the American frogs of the genus Rana G A Boulenger (1920) Proceedings of the American Academy of Arts and Sciences 55: 413-480 |
 | The Amphibia of Greer County, Oklahoma A N Bragg (1955) The Great Basin Naturalist 15: 27-31 |
 | Catalogue of type specimens of reptiles and amphibians in Chicago Natural History Museum Hymen Marx (1958) Fieldiana, Zool. 36(4): 407-496 |
 | Type specimens of reptiles and amphibians in the United States National Museum (1961) Bulletin of the United States National Museum 220: 1-291 |