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Conodont Distribution, Paleoecology, and Preliminary Biostratigraphy of the Upper Cherokee and Marmaton Groups (Upper Desmoinesian, Middle Pennsylvanian) from Two Cores in South-central Iowa

B. J. BunkerJohn W. SwadeGreg A. LudvigsonBrian J. Witzke

出版	Iowa Geological Survey, 1980
URL	http://books.google.com.hk/books?id=bxCa9AHSA0MC&hl=&source=gbs_api