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  1. By: Spies, J J - Plessis, H Du
    Type: Article
    In: Bothalia
    Volume: 17
    Issue: 2
    Date: 1987-10-23
    Page Range: 257--259
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  2. By: Spies, J J - Plessis, H Du
    Type: Article
    In: Bothalia
    Volume: 16
    Issue: 2
    Date: 1986-10-28
    Page Range: 269--271
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  3. By: Spies, J J - Plessis, H Du
    Type: Article
    In: Bothalia
    Volume: 18
    Issue: 1
    Date: 1988-10-23
    Page Range: 111--114
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-