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  1. By: Irving, Robert S
    Type: Article
    In: SIDA, contributions to botany
    Volume: 8
    Date: 1980
    Page Range: 312--313
    Publication Info: [Dallas W. F. Mahler, etc.] 1962-
  2. By: Irving, Robert S
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 26
    Date: 1979
    Page Range: 184--187
    Publication Info: Berkeley, California Botanical Society,
  3. By: Irving, Robert S
    Type: Article
    In: SIDA, contributions to botany
    Volume: 7
    Date: 1977
    Page Range: 103--106
    Publication Info: [Dallas W. F. Mahler, etc.] 1962-
  4. By: Irving, Robert S
    Type: Article
    In: SIDA, contributions to botany
    Volume: 5
    Date: 1972
    Page Range: 8--22
    Publication Info: [Dallas W. F. Mahler, etc.] 1962-