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  1. By: Beck, Stanley D - Alexander, Nancy
    Type: Article
    In: The Biological bulletin.
    Volume: 126
    Date: 1964-04-01
    Page Range: 175--184
    Publication info: Woods Hole, Mass. :Marine Biological Laboratory,
  2. By: Beck, Stanley D - Alexander, Nancy
    Type: Article
    In: The Biological bulletin.
    Volume: 126
    Date: 1964-04-01
    Page Range: 185--198
    Publication info: Woods Hole, Mass. :Marine Biological Laboratory,