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  1. By: Hopson, J
    Type: Article
    In: The Emu : official organ of the Australasian Ornithologists' Union
    Volume: 19
    Issue: 2
    Date: 1919-10-01
    Page Range: 141--141
    Publication Info: Melbourne Royal Australasian Ornithologists Union 1901-
  2. By: Hopson, A J - Hopson, J
    Type: Article
    In: Bulletin of the British Museum (Natural History) Zoology
    Volume: 13
    Date: 1965-10-15
    Page Range: 99--149
    Publication Info: London, BM(NH),