Roth, B. (1990). New haplotrematid land snails, Ancotrema and Haplotrema (Gastropoda: Pulmonata), from the Sierra Nevada and North Coast Ranges, California. The Wasmann Journal of Biology, 47(1-2): 68-76.
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Roth, B.
1990
New haplotrematid land snails, Ancotrema and Haplotrema (Gastropoda: Pulmonata), from the Sierra Nevada and North Coast Ranges, California.