Verbatim text: Turner, B. L. and D. Dawson. 1980. Taxonomy of Tetragonotheca (Asteraceae–Heliantheae). Sida 8: 296–303.
Author: Turner, B.L., Dawson, D.
Year: 1980
Title: Taxonomy of Tetragonotheca (Asteraceae–Heliantheae)
Journal: Sida
Volume: 8
Pages: 296–303