TY - JOUR A1 - Winslow, M.L. JO - Occasional Papers of the Museum of Zoology, University of Michigan C1 - 180: 1-9, plates 1-2 TI - The varieties of Planorbis campanulatus Say. UR - https://www.molluscabase.org/aphia.php?p=sourcedetails&id=350132 PY - 1926 Y2 - 2024-03-29 ER -