Reference:Perry1937a
Revision as of 01:05, 27 July 2019 by Unknown user (talk)
Verbatim text: Perry, L. M. 1937. Notes on Silphium. Rhodora 39: 281–297.
Author: Perry, L.M.
Year: 1937
Title: Notes on Silphium
Journal: Rhodora
Volume: 39
Pages: 281–297