BioStor
 | Scientific results of explorations by the U. S. Fish Commission steamer Albatross. No. XXV..Report on thg mollusk-fauna of the Galapagos Islands with descriptions of new species Robert E C Stearns (1893) Proceedings of The United States National Museum 16: 353-450 |
 | Insular Landshell Faunas, Especially as Illustrated by the Data Obtained by Dr. G. Baur in the Galapagos Islands William Healey Dall (1896) Proceedings of The Academy of Natural Sciences of Philadelphia 48: 395-460 |
 | Landshells of the Galapagos Islands William Healey Dall and Washington Henry Ochsner (1928) Proceedings of the California Academy of Sciences 17: 141-185 |
 | Contribution to the biogeography of Cocos Island, including a bibliography L G Hertleim (1963) Proc. Calif. Acad. Sci. 32: 219-289 |