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  1. By: Mcilhenny, E A - Bennitt, Rudolf
    Type: Article
    In: The Wilson bulletin
    Volume: 50
    Issue: 2
    Date: 1938
    Page Range: 159--160
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Bennitt, Rudolf - Merrick, Amanda Dickson
    Type: Article
    In: The Biological bulletin
    Volume: 62
    Date: 1932-04-01
    Page Range: 168--177
    Publication Info: Woods Hole, Mass Marine Biological Laboratory