Reference:Ballard1992a
Revision as of 12:44, 20 August 2020 by imported>Unknown user
Verbatim text: Ballard, H. E. 1992. Systematics of Viola Section Viola in North America North of Mexico. M.S. thesis. Central Michigan University.
Author: Ballard, H.E.
Year: 1992
Title: Systematics of Viola Section Viola in North America North of Mexico