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  1. By: Roux, F - Benson, C. W. (Constantine Walter),
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 89
    Date: 1969
    Page Range: 67--68
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Roux, F - Benson, C. W. (Constantine Walter),
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 90
    Date: 1970
    Page Range: 117--117
    Publication Info: London, British Ornithologists' Club, 1893-