Verbatim text: Montgomery, J. D. and E. M. Paulton. 1981. Dryopteris in North America. Fiddlehead Forum 8: 25--31.
Author: Montgomery, J.D., Paulton, E.M.
Year: 1981
Title: Dryopteris in North America
Journal: Fiddlehead Forum
Volume: 8
Pages: 25–31