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  1. By: Immelman, K
    Type: Article
    In: Bothalia
    Volume: 16
    Issue: 1
    Date: 1986-07-22
    Page Range: 39--41
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  2. By: Immelman, K
    Type: Article
    In: Bothalia
    Volume: 20
    Issue: 1
    Date: 1990-10-18
    Page Range: 61--66
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-