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  1. By: Ayres., Thomas - Gurney, John Henry
    Type: Article
    In: Ibis
    Volume: 3
    Series: 5
    Issue: 4
    Date: 1885
    Page Range: 341--351
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,
  2. By: Ayres., Thomas
    Type: Article
    In: Ibis
    Volume: 4
    Series: 5
    Issue: 3
    Date: 1886
    Page Range: 282--298
    Publication Info: [London], Published for the British Ornithologists' Union by Academic Press,