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Structure of Herrin (no. 6) Coal Bed in Marion and Fayette Counties and Adjacent Parts of Bond, Clinton, Montgomery, Clay, Effingham, Washington, Jeff
Raymond Siever
Petrology and Sedimentation of Upper Chester Sandstones; Report of Investigations No. 170
Raymond SieverClassification of the Pennsylvanian Rocks of Illinois as of 1956; Illinois State Geological Survey Circular 217
Raymond Siever
