Verbatim text: Turner, B. L. and D. Zippin. 1992. Taxonomic study of Venegasia (Asteraceae: Helenieae). Sida 15: 223–229.
Author: Turner, B.L., Zippin, D.
Year: 1992
Title: Taxonomic study of Venegasia (Asteraceae: Helenieae)
Journal: Sida
Volume: 15
Pages: 223–229