Guide to eastern ferns
By: by Edgar T. Wherry.
Edition: 2d ed., rev. and enl.
Publisher: The Science press printing company
Published: 1942
Place of publication: [Lancaster, Pa.]
Language: eng
Number of pages: 252
Subjects: Ferns -- United States.
Other titles: Eastern ferns.
Notes: "An aid in the identification of the ferns and fern-allies of the region from Pennsylvania and New Jersey to Virginia."--p.1.