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  1. By: Retief, E
    Type: Article
    In: Bothalia
    Volume: 20
    Issue: 2
    Date: 1990-10-17
    Page Range: 219--221
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  2. By: Retief, E
    Type: Article
    In: Bothalia
    Volume: 18
    Issue: 1
    Date: 1988-10-23
    Page Range: 97--99
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  3. By: Retief, E
    Type: Article
    In: Bothalia
    Volume: 16
    Issue: 1
    Date: 1986-07-22
    Page Range: 44--45
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  4. By: Retief, E
    Type: Article
    In: Bothalia
    Volume: 16
    Issue: 2
    Date: 1986-10-28
    Page Range: 228--229
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  5. By: Russell, G E Gibbs - Welman, W G - Germishuizen, G - Retief, E - Pienaar, B J - Reid, Christopher S. - Fisch, L - Van Rooy, J - Van Wyk, C M - Kalake, E
    Type: Article
    In: Bothalia
    Volume: 18
    Issue: 2
    Date: 1988-10-23
    Page Range: 293--304
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  6. By: Retief, E
    Type: Article
    In: Bothalia
    Volume: 17
    Issue: 2
    Date: 1987-10-23
    Page Range: 189--190
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-