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  1. By: Hilty, Steven L - Ascanio, David
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 134
    Issue: 4
    Date: 2014
    Page Range: 270--279
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Marantz, Curtis A - Ascanio, David - Daniels, Brian E
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 131
    Issue: 1
    Date: 2011
    Page Range: 41--53
    Publication Info: London, British Ornithologists' Club, 1893-