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  1. By: Olsen, John
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 24
    Date: 1977
    Page Range: 29--36
    Publication Info: Berkeley, California Botanical Society,
  2. By: Olsen, John
    Type: Article
    In: SIDA, contributions to botany
    Volume: 13
    Date: 1988
    Page Range: 45--56
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  3. By: Olsen, John
    Type: Article
    In: SIDA, contributions to botany
    Volume: 8
    Date: 1979
    Page Range: 128--134
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  4. By: Turner, B. L. (Billie Lee) - Olsen, John
    Type: Article
    In: SIDA, contributions to botany
    Volume: 13
    Date: 1988
    Page Range: 39--43
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-