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  1. By: Gutknecht, John
    Type: Article
    In: The Biological bulletin
    Volume: 129
    Date: 1965-12-01
    Page Range: 495--509
    Publication Info: Woods Hole, Mass Marine Biological Laboratory
  2. By: Gutknecht, John
    Type: Article
    In: The Biological bulletin
    Volume: 130
    Date: 1966-06-01
    Page Range: 331--344
    Publication Info: Woods Hole, Mass Marine Biological Laboratory