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  1. By: Blackwell, Will H., - Haacke, J Douglas - Hopkins, Christine O
    Type: Article
    In: SIDA, contributions to botany
    Volume: 8
    Date: 1979
    Page Range: 157--169
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  2. By: Hopkins, Christine O - Blackwell, Will H., - Melo-Costa, Wanessa de
    Type: Article
    In: SIDA, contributions to botany
    Volume: 7
    Date: 1977
    Page Range: 147--173
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-