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  1. By: Powers, Edwin Booth,
    Publication info: Urbana, Ill, University of Illinois, c1918
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Powers, Edwin Booth,
    Publication info: 1918
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Powers, Edwin Booth,
    Type: Article
    In: The Biological bulletin
    Volume: 27
    Date: 1914-10-01
    Page Range: 177--200
    Publication Info: Woods Hole, Mass Marine Biological Laboratory