TY - JOUR A1 - Hershler, R. JO - Smithsonian Contributions to Zoology SP - 1 EP - 115 C1 - 554: 1-115 TI - A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae) UR - https://repository.si.edu/handle/10088/5139 VL - 554 PY - 1994 Y2 - 2024-03-29 ER -