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  1. By: Simpson, Margaret
    Type: Article
    In: The Biological bulletin
    Volume: 123
    Date: 1962-10-01
    Page Range: 412--423
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Simpson, Margaret
    Type: Article
    In: The Biological bulletin
    Volume: 123
    Date: 1962-10-01
    Page Range: 396--411
    Publication Info: Woods Hole, Mass Marine Biological Laboratory