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  1. By: Hawkins, C A - Walker, P H
    Type: Article
    In: Journal and proceedings of the Royal Society of New South Wales
    Volume: 94
    Issue: 3
    Date: 1960-11-18
    Page Range: 115--120
    Publication Info: Sydney C. Potter, Acting. Govt. Printer 1877-
  2. By: Hawkins, C A - Walker, P H
    Type: Article
    In: Journal and proceedings of the Royal Society of New South Wales
    Volume: 90
    Issue: 3
    Date: 1957-04-10
    Page Range: 110--127
    Publication Info: Sydney C. Potter, Acting. Govt. Printer 1877-
  3. By: Walker, P H - Hawkins, C A
    Type: Article
    In: Journal and proceedings of the Royal Society of New South Wales
    Volume: 91
    Issue: 2
    Date: 1957-12-11
    Page Range: 67--84
    Publication Info: Sydney C. Potter, Acting. Govt. Printer 1877-