MolluscaBase source details
van der Schalie, H. (1938). On the occurrence of Helix lactea Müller in North America. The Nautilus. 51(4): 132-134.
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van der Schalie, H.
1938
On the occurrence of <i>Helix lactea</i> Müller in North America
The Nautilus
51(4): 132-134
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