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Stratigraphy and Cyclic Sedimentation of Middle and Upper Pennsylvanian Strata Around Winterset, Iowa

Philip H. Heckel

出版	Iowa Department of Natural Resources, Energy and Geological Resources Division, Geological Survey Bureau, 1992
URL	http://books.google.com.hk/books?id=gGM8KpL-JvgC&hl=&source=gbs_api