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  1. By: Irving, E - Boesen, R - Robertson, W A
    Type: Article
    In: Journal and proceedings of the Royal Society of New South Wales
    Volume: 94
    Issue: 6
    Date: 1961-05-09
    Page Range: 227--232
    Publication Info: Sydney C. Potter, Acting. Govt. Printer 1877-
  2. By: Robertson, W A
    Type: Article
    In: Journal and proceedings of the Royal Society of New South Wales
    Volume: 112
    Issue: 1
    Date: 1979-10-12
    Page Range: 31--35
    Publication Info: Sydney C. Potter, Acting. Govt. Printer 1877-