Verbatim text: Ornduff, R. and B. A. Bohm. 1975. Relationships of Tracyina and Rigiopappus (Compositae). Madroño 23: 53–55.
Author: Ornduff, R., Bohm, B.A.
Year: 1975
Title: Relationships of Tracyina and Rigiopappus (Compositae)
Journal: Madroño
Volume: 23
Pages: 53–55