Whitfield, R.P. (1907). Remarks on and descriptions of new fossil Unionidae from the Laramie clays of Montana. Bulletin of the American Museum of Natural History. 23(26): 623-628.
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Whitfield, R.P.
1907
Remarks on and descriptions of new fossil Unionidae from the Laramie clays of Montana
Bulletin of the American Museum of Natural History