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  1. By: Heyn, William
    Type: Article
    In: Papers and proceedings of the Royal Society of Tasmania
    Date: 1900-1901
    Page Range: 21--37
    Publication Info: Hobart, Tasmania, The Society,
  2. By: Heyn, William
    Type: Article
    In: Papers and proceedings of the Royal Society of Tasmania
    Date: 1902
    Page Range: 1--15
    Publication Info: Hobart, Tasmania, The Society,