Reference:Wagenknecht1960a
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Verbatim text: Wagenknecht, B. L. 1960. Revision of Heterotheca sect. Heterotheca (Compositae). Rhodora 62: 61–76, 97–107.
Author: Wagenknecht, B.L.
Year: 1960
Title: Revision of Heterotheca sect. Heterotheca (Compositae)
Journal: Rhodora
Volume: 62
Pages: 61–76, 97–107