Leonard, A. B. & Ho, T.-Y. (1960). New Calipyrgula from Pleistocene of Texas and notes on Cochliopa riograndensis. The Nautilus. 73(4): 125-129, pls. 12-13.
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Leonard, A. B. & Ho, T.-Y.
1960
New <i>Calipyrgula</i> from Pleistocene of Texas and notes on <i>Cochliopa riograndensis</i>