Weisbord, N. E., 1929. Miocene Mollusca of Northern Columbia. Bulletins of American Paleontology, 14 (54 ).
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New Species-Group Names:
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colombiensis Weisbord, 1929. p. 289 (57). pl. v. f. 12.
Weisbord, N. E., 1929. Miocene Mollusca of Northern Columbia. Bulletins of American Paleontology, 14 (54 ).