dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Gruber, Calvin Luther
    Type: Article
    In: American fern journal
    Volume: 7
    Date: 1917
    Page Range: 67--73
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Gruber, Calvin Luther
    Type: Article
    In: American fern journal
    Volume: 7
    Date: 1917
    Page Range: 114--121
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Britton, Nathaniel Lord, - Greene, Edward L - Beal, W. J. (William James), - Gruber, Calvin Luther
    Type: Article
    In: Torreya
    Volume: 1
    Issue: 4
    Date: 1901
    Page Range: 41--43
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945