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Plants collected by R. C. Ching in southern Mongolia and Kansu Province, China
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Plants collected by R. C. Ching in southern Mongolia and Kansu Province, China
Date:
1941
Citation:
Walker, Egbert H. 1941. "Plants collected by R. C. Ching in southern Mongolia and Kansu Province, China." in Systematic plant studies, 563–675. Contributions from the United States National Herbarium. Washington, DC: Government Printing Office.
