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  1. By: Christensen, P
    Type: Article
    In: Journal of the Royal Society of Western Australia
    Volume: 65
    Issue: 4
    Date: 1982
    Page Range: 131--141
    Publication Info: Perth, The Society, 1915
  2. By: Christensen, P
    Type: Article
    In: The Western Australian Naturalist
    Volume: 12
    Issue: 4
    Date: 1972-08-17
    Page Range: 96--96
    Publication Info: Nedlands, W.A, Western Australian Naturalists' Club, 1947
  3. By: Christensen, P
    Type: Article
    In: The Western Australian Naturalist
    Volume: 12
    Issue: 4
    Date: 1972-08-17
    Page Range: 88--89
    Publication Info: Nedlands, W.A, Western Australian Naturalists' Club, 1947
  4. By: Christensen, P - Leftwich, T
    Type: Article
    In: Journal of the Royal Society of Western Australia
    Volume: 63
    Issue: 2
    Date: 1980
    Page Range: 33--38
    Publication Info: Perth, The Society, 1915