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  1. By: Krabbe, Niels, - Poulsen, Bent Otto - Frolander, Amy
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 116
    Date: 1996
    Page Range: 230--243
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Rasmussen, Jan F - Rahbek, Carsten - Poulsen, Bent Otto - Poulsen, Michael K - Bloch, Hanne
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 116
    Date: 1996
    Page Range: 26--46
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Krabbe, Niels, - Poulsen, Bent Otto - Frolander, Amy - Rodríguez Barahona, Orfa
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 117
    Date: 1997
    Page Range: 248--256
    Publication Info: London, British Ornithologists' Club, 1893-
  4. By: Poulsen, Bent Otto
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 116
    Date: 1996
    Page Range: 67--74
    Publication Info: London, British Ornithologists' Club, 1893-