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  1. By: Craighead, John - Craighead, Frank C., (Frank Cooper),
    Type: Article
    In: The Wilson bulletin
    Volume: 52
    Issue: 4
    Date: 1940
    Page Range: 241--248
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Craighead, Frank C., (Frank Cooper), - Dunstan, T C
    Type: Article
    In: Raptor research
    Volume: 10
    Issue: 4
    Date: 1976
    Page Range: 112--119
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]