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  1. By: Gregory, Phil (Bird watcher)
    Type: Article
    In: The Wilson journal of ornithology
    Volume: 119
    Issue: 1
    Date: 2007
    Page Range: 144--146
    Publication Info: Lawrence, KS, Wilson Ornithological Society, 2006-
  2. By: Gregory, Phil (Bird watcher) - Johnston, G R
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 113
    Date: 1993
    Page Range: 139--145
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Dutson, Guy C. L. - Gregory, Phil (Bird watcher) - Boles, Walter E.,
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 131
    Issue: 3
    Date: 2011
    Page Range: 204--206
    Publication Info: London, British Ornithologists' Club, 1893-
  4. By: Gregory, Phil (Bird watcher) - Nkator, James - Amankwaa, Andrew
    Type: Article
    In: Bulletin of the African Bird Club
    Volume: 24
    Issue: 1
    Date: 2017-03
    Page Range: 94--95
    Publication Info: Cambridge, African Bird Club, 1994-
  5. By: Gregory, Phil (Bird watcher) - Hornbuckle, Jon
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 122
    Date: 2002
    Page Range: 317--320
    Publication Info: London, British Ornithologists' Club, 1893-
  6. By: Gregory, Phil (Bird watcher)
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 114
    Date: 1994
    Page Range: 12--20
    Publication Info: London, British Ornithologists' Club, 1893-
  7. By: Gregory, Phil (Bird watcher)
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 117
    Date: 1997
    Page Range: 304--311
    Publication Info: London, British Ornithologists' Club, 1893-