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  1. By: Langdon, Raymond Forbes Newton
    Type: Article
    In: The Proceedings of the Royal Society of Queensland
    Volume: 54
    Date: 1943
    Page Range: 23--32
    Publication Info: [Brisbane Royal Society of Queensland] 1885-
  2. By: Langdon, Raymond Forbes Newton
    Type: Article
    In: The Proceedings of the Royal Society of Queensland
    Volume: 61
    Date: 1950
    Page Range: 31--35
    Publication Info: [Brisbane Royal Society of Queensland] 1885-