Frogs of ColumbiaPublished in Bull U S National Museum, in 1970, in volume 288, pages 1-655Catalogue of the Neotropical Squamata. Part I. SnakesPublished in Bulletin United States National Museum, in 1970, in volume 297, pages 1-347
Catalogue of the Neotropical Squamata. Part I. SnakesPublished in Bulletin United States National Museum, in 1970, in volume 297, pages 1-347