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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Butcher, Earl O
    Type: Article
    In: The Biological bulletin
    Volume: 77
    Date: 1939-10-01
    Page Range: 258--267
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Butcher, Earl O
    Type: Article
    In: The Biological bulletin
    Volume: 56
    Date: 1929-02-01
    Page Range: 87--99
    Publication Info: Woods Hole, Mass Marine Biological Laboratory