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  1. By: Hays, John F
    Type: Article
    In: Journal of the Botanical Research Institute of Texas
    Volume: 4
    Date: 2010
    Page Range: 1--6
    Publication Info: Fort Worth, Tex, Botanical Research Institute of Texas, 2007-
  2. By: Hays, John F
    Type: Article
    In: SIDA, contributions to botany
    Volume: 18
    Date: 1998
    Page Range: 555--577
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  3. By: Hays, John F
    Type: Article
    In: SIDA, contributions to botany
    Volume: 18
    Date: 1998
    Page Range: 369--370
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  4. By: Reed, Monique Dubrule - Hays, John F - Canne-Hilliker, Judith M. - Price, Dana - Singhurst, Jason R. - Keith, Eric L
    Type: Article
    In: SIDA, contributions to botany
    Volume: 21
    Date: 2005
    Page Range: 1927--1929
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-