Dall, W. H.; Ochsner, W. H. (1928). Tertiary and Pleistocene Mollusca from the Galapagos Islands. Proceedings of the California Academy of Sciences. ser. 4, 17(4): 89-139, pls 2-7.
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Dall, W. H.; Ochsner, W. H.
1928
Tertiary and Pleistocene Mollusca from the Galapagos Islands