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  1. By: Stewart, Rebecca L M - Francis, Charles M - Massey, Cheryl
    Type: Article
    In: The Wilson bulletin
    Volume: 114
    Issue: 2
    Date: 2002
    Page Range: 264--271
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Smith, Adam C - Hudson, Marie-Anne R. - Downes, Constance - Francis, Charles M
    Type: Article
    In: The Canadian field-naturalist
    Volume: 128
    Issue: 2
    Date: 2014-07-03
    Page Range: 119--134
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Wells, David R. - Francis, Charles M
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 104
    Date: 1984
    Page Range: 125--127
    Publication Info: London, British Ornithologists' Club, 1893-
  4. By: Hill, J. E. - Francis, Charles M
    Type: Article
    In: Bulletin of the British Museum (Natural History) Zoology
    Volume: 47
    Date: 1984-10-25
    Page Range: 305--329
    Publication Info: London, BM(NH),