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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Olson, Storrs L. - Fleischer, Robert C - Fisher, Clemency T. - Bermingham, Eldredge
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 125
    Date: 2005
    Page Range: 31--42
    Publication Info: London, British Ornithologists' Club, 1893-