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  1. By: Reyneke, W F - Van der Schijff, H. P. (Hermanus Philippus)
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 56
    Issue: 2
    Date: 1975
    Page Range: 256--263
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-
  2. By: Robbertse, P J - Van der Schijff, H. P. (Hermanus Philippus)
    Type: Article
    In: Mitteilungen der Botanischen Staatssammlung München
    Volume: 10
    Date: 1971
    Page Range: 170--177
    Publication Info: Munich, H. Merxmüller, [1950]-1991 [i.e. 1992]
  3. By: Van der Schijff, H. P. (Hermanus Philippus) - Snyman, L
    Type: Article
    In: Journal of the Arnold Arboretum
    Volume: 51
    Issue: 1
    Date: 1970
    Page Range: 114--128
    Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-