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Notes on Certain Type Specimens of American Asteraceae in European Herbaria

Carl ChristensenConrad Vernon MortonEdwin Bunting BartramEllsworth Paine KillipHenri PittierSidney Fay BlakeWilliam Trelease

出版	U.S. Government Printing Office, 1939
URL	http://books.google.com.hk/books?id=bzLMG1R24lwC&hl=&source=gbs_api