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  1. By: Spellenberg, Richard - Worthington, Richard D., - Knight, Paul J - Fletcher, Reggie A
    Type: Article
    In: SIDA, contributions to botany
    Volume: 11
    Date: 1986
    Page Range: 455--470
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  2. By: Worthington, Richard D.,
    Type: Article
    In: SIDA, contributions to botany
    Volume: 14
    Date: 1990
    Page Range: 135--137
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  3. By: Allred, Kelly W. (Kelly Wayne) - Darigo, Carl - Worthington, Richard D.,
    Type: Article
    In: Evansia
    Volume: 15
    Issue: 3
    Date: 1998
    Page Range: 95--98
    Publication Info: Springfield, Mo American Bryological and Lichenological Society c1984-
  4. By: Worthington, Richard D.,
    Type: Article
    In: SIDA, contributions to botany
    Volume: 9
    Date: 1982
    Page Range: 368--368
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  5. By: Pinkava, Donald J - Parfitt, Bruce D - Baker, Marc A. - Worthington, Richard D.,
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 39
    Date: 1992
    Page Range: 98--113
    Publication Info: Berkeley, California Botanical Society,
  6. By: Worthington, Richard D.,
    Type: Article
    In: Phytologia
    Volume: 80
    Date: 1996
    Page Range: 121--127
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  7. By: Worthington, Richard D., - Arvizo, E R
    Type: Article
    In: The Great Basin naturalist
    Volume: 33
    Date: 1973
    Page Range: 124--128
    Publication Info: Provo, Utah, M.L. Bean Life Science Museum, Brigham Young University,
  8. By: Weber, William A. (William Alfred), - Wittmann, Ronald C. - Worthington, Richard D.,
    Type: Article
    In: Evansia
    Volume: 20
    Issue: 3
    Date: 2003
    Page Range: 104--106
    Publication Info: Springfield, Mo American Bryological and Lichenological Society c1984-
  9. By: Gilbertson, Lance H - Worthington, Richard D.,
    Type: Article
    In: The veliger
    Volume: 46
    Date: 2003
    Page Range: 220--224
    Publication Info: Berkeley, CA, California Malacozoological Society,
  10. By: Willson, James - Spellenberg, Richard - Wolfe, H. - Smith, Peggy - Sproul, Fred T - Moran, Reid - Reid, William H - Worthington, Richard D.,
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 26
    Date: 1979
    Page Range: 48--50
    Publication Info: Berkeley, California Botanical Society,
  11. By: Worthington, Richard D.,
    Type: Article
    In: SIDA, contributions to botany
    Volume: 11
    Date: 1985
    Page Range: 246--246
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  12. By: Freeman, C Edward - Worthington, Richard D.,
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 32
    Date: 1985
    Page Range: 78--86
    Publication Info: Berkeley, California Botanical Society,