Reference:Williams1936a
Revision as of 22:32, 26 July 2019 by Unknown user (talk)
Verbatim text: Williams, L. O. 1936. Revision of the western primulas. Amer. Midl. Naturalist 17: 744–748.
Author: Williams, L.O.
Year: 1936
Title: Revision of the western primulas
Journal: Amer. Midl. Naturalist
Volume: 17
Pages: 744–748