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  1. DESCRIPTION OF A POSSIBLE NEW SPECIES OF LEAF WARBLER OF THE GENUS PHYLLOSCOPUS FROM CHINA
    By: Alstrom, P - Colston, P R - Olsson, U
    Type: Article
    In: Bulletin of The British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 43--47
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  2. GYNANDROMORPHISM IN THE PINK-BROWED ROSEFINCH CARPODACUS-RHODOCHROUS
    By: Alstrom, P - Olsson, U
    Type: Article
    In: Bulletin of The British Ornithologists' Club
    Volume: 108
    Date: 1988
    Page Range: 12--12
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  3. ON THE TAXONOMIC STATUS OF PHYLLOSCOPUS-AFFINIS AND PHYLLOSCOPUS-SUBAFFINIS
    By: Alstrom, P - Olsson, U
    Type: Article
    In: Bulletin of The British Ornithologists' Club
    Volume: 112
    Date: 1992
    Page Range: 111--125
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  4. TAXONOMY OF THE PHYLLOSCOPUS-PROREGULUS COMPLEX
    By: Alstrom, P - Olsson, U
    Type: Article
    In: Bulletin of The British Ornithologists' Club
    Volume: 110
    Date: 1990
    Page Range: 38--43
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