BioStor
 | The Galapagoan lizards of the genus Tropidurus; with notes on the iguanas of the genera Conolophus and Amblyrhynchus John Van Denburgh and Joseph R Slevin (1913) Proceedings of the California Academy of Sciences 2: 133-202 |
 | The South American lizards in the collection of the United States National Museum Charles E Burt and May Danheim Burt (1930) Proceedings of the United States National Museum 78(2849): 1-52 |