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  1. By: Spjut, Richard W
    Type: Article
    In: Journal of the Botanical Research Institute of Texas
    Volume: 1
    Date: 2007
    Page Range: 291--332
    Publication Info: Fort Worth, Tex, Botanical Research Institute of Texas, 2007-
  2. By: Spjut, Richard W
    Type: Article
    In: SIDA, contributions to botany
    Volume: 21
    Date: 2005
    Page Range: 2205--2241
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  3. By: Spjut, Richard W
    Type: Article
    In: Journal of the Botanical Research Institute of Texas
    Volume: 1
    Date: 2007
    Page Range: 203--289
    Publication Info: Fort Worth, Tex, Botanical Research Institute of Texas, 2007-