dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. 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
  2. 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
  3. 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