Showing 1 - 2 results of 2 for search 'Simpson, Donald Ray, 1935-', query time: 0.10s Refine Results
  1. 1
    A partial revision of Paullinia (Sapindaceae) for Ecuador, Peru, and Bolivia /
    by Simpson, Donald Ray, 1935-
    Published 1976
    Book
  2. 2
    New species from South America, I- /
    by Simpson, Donald Ray, 1935-
    Published 1972
    Book
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