Verbatim text: Sundberg, S. D. 1986. The Systematics of Aster Subgenus Oxytripolium (Compositae) and Historically Allied Species. Ph.D. dissertation. University of Texas.
Author: Sundberg, S.D.
Year: 1986
Title: The Systematics of Aster Subgenus Oxytripolium (Compositae) and Historically Allied Species