Harris, G. D. (1899). The Lignitic stage, part II, Scaphopoda, Gastropoda, Pteropoda and Cephalopoda. Bulletins of American Paleontology. 3(11): 1-128, pls 1-12.
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Harris, G. D.
1899
The Lignitic stage, part II, Scaphopoda, Gastropoda, Pteropoda and Cephalopoda