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  1. By: Balda, Russell P. (Russell Paul), - Bateman, Gary C - Foster, Gene F
    Type: Article
    In: The Wilson bulletin
    Volume: 84
    Issue: 1
    Date: 1972
    Page Range: 60--76
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Carothers, Steven W. (Steven Warren), - Sharber, N Joseph - Foster, Gene F
    Type: Article
    In: The Wilson bulletin
    Volume: 86
    Issue: 2
    Date: 1974
    Page Range: 121--124
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-