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Contributions from the United States National Herbarium

Albert MannCharles Baron ClarkeCharles Vancouver PiperEdward Lee GreeneJanet Russell PerkinsJoseph Nelson RoseWilliam Ralph Maxon

出版	U.S. Government Printing Office, 1908
URL	http://books.google.com.hk/books?id=EfVAAQAAMAAJ&hl=&source=gbs_api