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  1. By: Wagner, Warren H.‏ (Warren Herbert),‏ - Hagenah, Dale J
    Type: Article
    In: Rhodora
    Volume: 58
    Date: 1956
    Page Range: 79--87
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Hagenah, Dale J - Morton, C. V. (Conrad Vernon)
    Type: Article
    In: American fern journal
    Volume: 46
    Date: 1956
    Page Range: 157--158
    Publication Info: [Washington, etc.] American Fern Society
  3. By: Wagner, Warren H.‏ (Warren Herbert),‏ - Hagenah, Dale J
    Type: Article
    In: Rhodora
    Volume: 56
    Date: 1954
    Page Range: 1--6
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  4. By: Hagenah, Dale J
    Type: Article
    In: Rhodora
    Volume: 52
    Date: 1950
    Page Range: 41--45
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  5. By: Hagenah, Dale J
    Type: Article
    In: American fern journal
    Volume: 56
    Date: 1966
    Page Range: 150--163
    Publication Info: [Washington, etc.] American Fern Society
  6. By: Hagenah, Dale J
    Type: Article
    In: Rhodora
    Volume: 63
    Date: 1961
    Page Range: 181--193
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],