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  1. By: Alström, Per - Colston, Peter - Olsson, Urban.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 43--47
    Publication Info: London, British Ornithologists' Club, 1893-
  2. By: Alström, Per - Olsson, Urban.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 108
    Date: 1988
    Page Range: 12--12
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Duckworth, J W - Alström, Per
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 124
    Date: 2004
    Page Range: 290--292
    Publication Info: London, British Ornithologists' Club, 1893-
  4. By: Duckworth, J W - Alström, Per - Davidson, Peter J. A. - Evans, Tom D. - Poole, Colin M. - Setha, Tan - Timmins, R. J.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 121
    Date: 2001
    Page Range: 152--182
    Publication Info: London, British Ornithologists' Club, 1893-
  5. By: Alström, Per - Olsson, Urban.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 112
    Date: 1992
    Page Range: 111--125
    Publication Info: London, British Ornithologists' Club, 1893-
  6. By: Alström, Per - Olsson, Urban. - Colston, Peter
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 115
    Date: 1995
    Page Range: 53--57
    Publication Info: London, British Ornithologists' Club, 1893-
  7. By: Alström, Per - Olsson, Urban. - Colston, Peter
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 117
    Date: 1997
    Page Range: 177--193
    Publication Info: London, British Ornithologists' Club, 1893-
  8. By: Alström, Per - Mild, Krister
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 113
    Date: 1993
    Page Range: 88--92
    Publication Info: London, British Ornithologists' Club, 1893-
  9. By: Alström, Per - Song, Gang - Zhang, Ruiying - Gao, Xuebin - Holt, Paul I - Olsson, Urban. - Lei, Fumin
    Type: Article
    In: Forktail
    Volume: 29
    Date: 2013
    Page Range: 94--99
    Publication Info: Oxford,
  10. By: Leader, Paul J - Carey, Geoff J - Olsson, Urban. - Baral, Hem Sagar. - Alström, Per
    Type: Article
    In: Forktail
    Volume: 26
    Date: 2010
    Page Range: 121--126
    Publication Info: Oxford,
  11. By: Alström, Per
    Type: Article
    In: Forktail
    Volume: 13
    Date: 1998
    Page Range: 97--107
    Publication Info: Oxford,
  12. By: Alström, Per - Olsson, Urban.
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 38--43
    Publication Info: London, British Ornithologists' Club, 1893-
  13. By: Alström, Per - Ranft, Richard
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 123A
    Date: 2003
    Page Range: 114--135
    Publication Info: London, British Ornithologists' Club, 1893-