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  1. By: Bir, S.S. (Sarmukh Singh), - Singh, C
    Type: Article
    In: The journal of the Bombay Natural History Society
    Volume: 86
    Date: 1989
    Page Range: 37--41
    Publication Info: Bombay Bombay Natural History Society 1886-
  2. By: Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 68
    Date: 1978
    Page Range: 55--56
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Lellinger, David B. - Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 72
    Date: 1982
    Page Range: 52--52
    Publication Info: [Washington, etc.] American Fern Society
  4. By: Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 52
    Date: 1962
    Page Range: 36--42
    Publication Info: [Washington, etc.] American Fern Society
  5. By: Bir, S.S. (Sarmukh Singh), - Sharma, M - Singh, C P
    Type: Article
    In: The journal of the Bombay Natural History Society
    Volume: 89
    Date: 1992
    Page Range: 143--146
    Publication Info: Bombay Bombay Natural History Society 1886-
  6. By: Bir, S.S. (Sarmukh Singh), - Vasudeva, S. M.
    Type: Article
    In: The journal of the Bombay Natural History Society
    Volume: 76
    Date: 1979
    Page Range: 556--558
    Publication Info: Bombay Bombay Natural History Society 1886-
  7. By: Bir, S.S. (Sarmukh Singh), - Trikha, Chander K
    Type: Article
    In: American fern journal
    Volume: 66
    Date: 1976
    Page Range: 109--110
    Publication Info: [Washington, etc.] American Fern Society
  8. By: Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 62
    Date: 1972
    Page Range: 44--46
    Publication Info: [Washington, etc.] American Fern Society
  9. By: Mehra, P N - Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 50
    Date: 1960
    Page Range: 276--295
    Publication Info: [Washington, etc.] American Fern Society
  10. By: Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 62
    Date: 1972
    Page Range: 27--29
    Publication Info: [Washington, etc.] American Fern Society
  11. By: Bir, S.S. (Sarmukh Singh),
    Type: Article
    In: American fern journal
    Volume: 60
    Date: 1970
    Page Range: 98--101
    Publication Info: [Washington, etc.] American Fern Society
  12. By: Bir, S.S. (Sarmukh Singh), - Vasudeva, Mohan
    Type: Article
    In: The journal of the Bombay Natural History Society
    Volume: 68
    Issue: 1
    Date: 1971
    Page Range: 169--195
    Publication Info: Bombay Bombay Natural History Society 1886-
  13. By: Bir, S.S. (Sarmukh Singh), - Trikha, Chander K
    Type: Article
    In: American fern journal
    Volume: 58
    Date: 1968
    Page Range: 119--125
    Publication Info: [Washington, etc.] American Fern Society
  14. By: Bir, S.S. (Sarmukh Singh), - Trikha, Chander K
    Type: Article
    In: American fern journal
    Volume: 64
    Date: 1974
    Page Range: 49--63
    Publication Info: [Washington, etc.] American Fern Society