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A list of the ferns and fern allies of North America north of Mexico :
with principal synonums and distribution /
By William R. Maxon.

APA Citation

Maxon, W. R. (William Ralph)., United States National Museum. (1901). A list of the ferns and fern allies of North America north of Mexico: with principal synonums and distribution. Washington, D.C.: Gov't. Print. Office.

MLA Citation

Maxon, William R. (William Ralph), 1877-1948, and United States National Museum. A List of the Ferns And Fern Allies of North America North of Mexico: With Principal Synonums And Distribution. Washington, D.C.: Gov't. Print. Office, 1901.

Warning: These citations may not always be complete (especially for serials).