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Russell, L. S. (1937). New non-marine Mollusca from the Upper Cretaceous of Alberta. Transactions of the Royal Society of Canada, third series. Section IV - Geological Sciences. 31: 61-67, 143.
Russell, L. S. (1937). New non-marine Mollusca from the Upper Cretaceous of Alberta. Transactions of the Royal Society of Canada, third series. Section IV - Geological Sciences. 31: 61-67, 143.
