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  1. By: webb, Kenneth L. - Johannes, R. E. (Robert Earl), - Coward, S J
    Type: Article
    In: The Biological bulletin
    Volume: 141
    Date: 1971-10-01
    Page Range: 364--371
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Johannes, R. E. (Robert Earl),
    Type: Article
    In: The veliger
    Volume: 5
    Date: 1963
    Page Range: 104--105
    Publication Info: Berkeley, CA, California Malacozoological Society,