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Characteristics of the Spore Assemblages of the Early and Middle Devonian Period from Dushan, Duyun of Kueichow Province and Their Stratigraphic Significance

Lian-da Kao

出版	Department of the Secretary of State, Translation Bureau, Multilingual Services Division, 1979
URL	http://books.google.com.hk/books?id=YtbstgAACAAJ&hl=&source=gbs_api