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  1. By: Trollope, Jeffrey
    Type: Article
    In: The Avicultural magazine
    Volume: 102
    Issue: 2
    Date: 1996
    Page Range: 59--63
    Publication Info: Ascot, Berkshire, etc Avicultural Society, etc
  2. By: Trollope, Jeffrey
    Type: Article
    In: The Avicultural magazine
    Volume: 111
    Issue: 3
    Date: 2005
    Page Range: 97--102
    Publication Info: Ascot, Berkshire, etc Avicultural Society, etc