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  1. By: Zika, Peter F. - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 99
    Date: 2009
    Page Range: 249--259
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Chiou, Wen-Liang - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 87
    Date: 1997
    Page Range: 77--86
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Farrar, Donald R., - Parks, J C - Mcalpin, B W
    Type: Article
    In: Rhodora
    Volume: 85
    Date: 1963
    Page Range: 83--92
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  4. By: Parks, J C - Farrar, Donald R.,
    Type: Article
    In: Rhodora
    Volume: 86
    Date: 1984
    Page Range: 421--424
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  5. By: Peck, James H - Nekola, Jeffery - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 79
    Date: 1989
    Page Range: 28--29
    Publication Info: [Washington, etc.] American Fern Society
  6. By: Stensvold, Mary C. - Farrar, Donald R., - Duffy, Aaron M.
    Type: Article
    In: American fern journal
    Volume: 105
    Date: 2015
    Page Range: 45-55
    Publication Info: [Washington, etc.] American Fern Society
  7. By: Chiou, Wen-Liang - Farrar, Donald R., - Ranker, Tom A
    Type: Article
    In: American fern journal
    Volume: 92
    Date: 2002
    Page Range: 65--65
    Publication Info: [Washington, etc.] American Fern Society
  8. By: Raine, Catherine A - Farrar, Donald R., - Sheffield, Elizabeth
    Type: Article
    In: American fern journal
    Volume: 81
    Date: 1991
    Page Range: 109--118
    Publication Info: [Washington, etc.] American Fern Society
  9. By: Watkins, James E., Jr. - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 92
    Date: 2002
    Page Range: 171--171
    Publication Info: [Washington, etc.] American Fern Society
  10. By: Farrar, Donald R., - Johnson-Groh, Cindy L.
    Type: Article
    In: American fern journal
    Volume: 81
    Date: 1991
    Page Range: 1--6
    Publication Info: [Washington, etc.] American Fern Society
  11. By: Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 92
    Date: 2002
    Page Range: 39--39
    Publication Info: [Washington, etc.] American Fern Society
  12. By: Crane, Edmund H - Farrar, Donald R., - Wendel, Jonathan F
    Type: Article
    In: American fern journal
    Volume: 85
    Date: 1995
    Page Range: 283--305
    Publication Info: [Washington, etc.] American Fern Society
  13. By: Mason, Nancy A - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 79
    Date: 1989
    Page Range: 143--145
    Publication Info: [Washington, etc.] American Fern Society
  14. By: Cayouette, Jacques, - Farrar, Donald R.,
    Type: Article
    In: The Canadian field-naturalist
    Volume: 123
    Issue: 3
    Date: 2009-07-01
    Page Range: 255--259
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  15. By: Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 66
    Date: 1976
    Page Range: 49--52
    Publication Info: [Washington, etc.] American Fern Society
  16. By: Mcalpin, Bruce - Farrar, Donald R.,
    Type: Article
    In: American fern journal
    Volume: 68
    Date: 1978
    Page Range: 97--98
    Publication Info: [Washington, etc.] American Fern Society
  17. By: Farrar, Donald R., - Redfearn, Paul L.,
    Type: Article
    In: American fern journal
    Volume: 58
    Date: 1968
    Page Range: 32--34
    Publication Info: [Washington, etc.] American Fern Society
  18. By: Stensvold, Mary C. - Farrar, Donald R., - Johnson-Groh, Cindy L.
    Type: Article
    In: American fern journal
    Volume: 92
    Date: 2002
    Page Range: 150--150
    Publication Info: [Washington, etc.] American Fern Society
  19. By: Farrar, Donald R., - Mickel, John T.
    Type: Article
    In: American fern journal
    Volume: 81
    Date: 1991
    Page Range: 69--75
    Publication Info: [Washington, etc.] American Fern Society