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  1. By: Codd, L. E. W. - Dyer, R. Allen (Robert Allen), - Rycroft, H. B. (Hedley Brian) - Winter, Bernard de, - South Africa. Department of Agricultural Technical Services.
    Publication info: Pretoria Govt. Printer 1963-
    Holding Institution: Multiple institutions
  1. By: Rycroft, H. B. (Hedley Brian)
    Type: Article
    In: Arnoldia
    Volume: 32
    Issue: 5
    Date: 1972
    Page Range: 220--225
    Publication Info: Jamaica Plain, Mass Arnold Arboretum, Harvard University
  2. By: Rycroft, H. B. (Hedley Brian)
    Type: Article
    In: Journal of South African botany
    Volume: 31
    Date: 1965
    Page Range: 89--94
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa