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  1. By: Parker, J G
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 205--206
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Parker, J G
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 100
    Date: 1980
    Page Range: 203--204
    Publication Info: London, British Ornithologists' Club, 1893-