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  1. By: Panagos, M D - Westfall, R. H. - Scheepers, J C
    Type: Article
    In: Bothalia
    Volume: 16
    Issue: 1
    Date: 1986-07-22
    Page Range: 89--92
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-
  2. By: Westfall, R. H. - Panagos, M D
    Type: Article
    In: Bothalia
    Volume: 18
    Issue: 1
    Date: 1988-10-23
    Page Range: 289--291
    Publication Info: Pretoria Botanical Research Institute, Dept. of Agricultural Technical Services 1921-