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  1. By: Johnson, Scott - Bertsch, Hans.
    Type: Article
    In: The veliger
    Volume: 27
    Date: 1985
    Page Range: 406--410
    Publication Info: Berkeley, CA, California Malacozoological Society,
  2. By: Johnson, Scott
    Type: Article
    In: The veliger
    Volume: 32
    Date: 1989
    Page Range: 1--7
    Publication Info: Berkeley, CA, California Malacozoological Society,