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Please read BHL's Acknowledgment of Harmful Content
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  1. By: North, Barbara B - Stephens, Grover C
    Type: Article
    In: The Biological bulletin
    Volume: 133
    Date: 1967-10-01
    Page Range: 391--400
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: North, Barbara B - Stephens, Grover C
    Type: Article
    In: The Biological bulletin
    Volume: 140
    Date: 1971-04-01
    Page Range: 242--254
    Publication Info: Woods Hole, Mass Marine Biological Laboratory