Reference
Ferns of Minnesota. Rolla M. Tryon. 2nd ed. 165 pp. illus. University of Minnesota Press, Minneapolis, 1980. $6.95 (soft cover); $15.95 (hard cover).
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Cranfill, R. Book Review. Econ Bot 36, 380 (1982). https://doi.org/10.1007/BF02862694
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DOI: https://doi.org/10.1007/BF02862694