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  1. By: Van der Byl, P. A.‏ (Paul Andries), ‏
    Publication info: Cape Town, Royal society of South Africa, 1917
    Holding Institution: Cornell University Library
  1. By: Van der Byl, P. A.‏ (Paul Andries), ‏
    Type: Article
    In: Transactions of the Royal Society of South Africa
    Volume: 10
    Date: 1922
    Page Range: 281--288
    Publication Info: Cape Town, Royal Society of South Africa,
  2. By: Van der Byl, P. A.‏ (Paul Andries), ‏
    Type: Article
    In: Transactions of the Royal Society of South Africa
    Volume: 9
    Date: 1921
    Page Range: 191--193
    Publication Info: Cape Town, Royal Society of South Africa,
  3. By: Van der Byl, P. A.‏ (Paul Andries), ‏ - Pole Evans, I. B. (Illtyd Buller),
    Type: Article
    In: Transactions of the Royal Society of South Africa
    Volume: 4
    Date: 1914
    Page Range: 231--239
    Publication Info: Cape Town, Royal Society of South Africa,
  4. By: Van der Byl, P. A.‏ (Paul Andries), ‏
    Type: Article
    In: Transactions of the Royal Society of South Africa
    Volume: 10
    Date: 1922
    Page Range: 151--157
    Publication Info: Cape Town, Royal Society of South Africa,