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Structure of Herrin (no. 6) Coal Bed in Madison County and Western Bond, Western Clinton, Southern Macoupin, Southwestern Montgomery, Northern St. Clair, and Northwestern Washington Counties, Illinois

J. N. Payne

出版	Department of Registration and Education, Division of the State Geological Survey, 1941
URL	http://books.google.com.hk/books?id=ZjPCk7_U8cAC&hl=&source=gbs_api