Reference:Koelling1964a
Revision as of 02:13, 29 July 2019 by Unknown user (talk)
Verbatim text: Koelling, A. C. 1964. Taxonomic Studies in Penstemon deamii and Its Allies. Ph.D. dissertation. University of Illinois.
Author: Koelling, A.C.
Year: 1964
Title: Taxonomic Studies in Penstemon deamii and Its Allies