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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bills, Charles E
    Type: Article
    In: The Biological bulletin
    Volume: 42
    Date: 1922-01-01
    Page Range: 7--13
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Bills, Charles E
    Type: Article
    In: The Biological bulletin
    Volume: 47
    Date: 1924-10-01
    Page Range: 253--264
    Publication Info: Woods Hole, Mass Marine Biological Laboratory