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  1. By: Knowles, Francis Gerald William,
    Type: Article
    In: The Biological bulletin
    Volume: 98
    Date: 1950-02-01
    Page Range: 66--80
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Kleinholz, L H - Knowles, Francis Gerald William,
    Type: Article
    In: The Biological bulletin
    Volume: 75
    Date: 1938-10-01
    Page Range: 266--273
    Publication Info: Woods Hole, Mass Marine Biological Laboratory