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  1. By: Barnes, Roger - Butchart, Stuart - Davies, Charles W. N. - Fernandez, Mirko - Seddon, Nathalie
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 117
    Date: 1997
    Page Range: 69--74
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Seddon, Nathalie - Barnes, Roger - Butchart, Stuart - Davies, Charles W. N. - Fernandez, M
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 116
    Date: 1996
    Page Range: 46--49
    Publication Info: London, British Ornithologists' Club, 1893-