Dall, William Healey. Tertiary and pleistocene mollusca from the Galapagos Islands / William Healey Dall and Washington Henry Ochsner. - 1928. - 89-139 p. BIB Now: 2233 Inglés ISBN: Normal Subjects--Index Terms: Mollusks Moluscos Paleontology Palentología Fossils Fósiles Dewey Class. No.: 564