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  1. By: Herbst, S N - Roberts, B R
    Type: Article
    In: Journal of South African Botany
    Volume: 40
    Issue: 4
    Date: 1974
    Page Range: 257--267
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  2. By: Roberts, B R
    Type: Article
    In: Journal of South African Botany
    Volume: 29
    Date: 1963
    Page Range: 153--162
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  3. By: Roberts, B R
    Type: Article
    In: Journal of South African Botany
    Volume: 33
    Date: 1967
    Page Range: 241--246
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  4. By: Roberts, B R
    Type: Article
    In: Journal of South African Botany
    Volume: 32
    Date: 1966
    Page Range: 243--260
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  5. By: Roberts, B R
    Type: Article
    In: Journal of South African Botany
    Volume: 27
    Date: 1961
    Page Range: 241--251
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa