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  1. By: Érard, Christian - Prevost, J
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 90
    Date: 1970
    Page Range: 157--157
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Érard, Christian - Prevost, J
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 91
    Date: 1971
    Page Range: 21--25
    Publication Info: London, British Ornithologists' Club, 1893-