Revision of Heterotheca, section Heterotheca (Compositae)
Wagenknecht, Burdette L
Article
1960
Rhodora
62
97--107
BioStor
[Cambridge, Mass., etc.], New England Botanical Club [etc.],
BioStor: https://biostor.org/reference/139137
In copyright. Digitized with the permission of the rights holder.
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http://creativecommons.org/licenses/by-nc-sa/3.0/
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