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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Goldberg, Stephen R. - Bursey, Charles R. - Hernandez, Sonia
    Type: Article
    In: Bulletin
    Volume: 98
    Date: 1999
    Page Range: 39--44
    Publication Info: Los Angeles, Calif, The Academy, 1971-
  2. By: Conway, April - Hernandez, Sonia - Carroll, John P
    Type: Article
    In: Bulletin of the African Bird Club
    Volume: 17
    Issue: 1
    Date: 2010-03
    Page Range: 90--91
    Publication Info: Cambridge, African Bird Club, 1994-