Coal resources of Illinois. Colchester (No. 2), Dekoven, and Jamestown coals [cartographic material] : with Belle Rive, Bristol Hill, Calhoun, Friendsville, Loudon, Oconee, Opdyke, Shelbyville, and Trowbridge coals / compiled by Janis D. Treworgy and Margaret H. Bargh ; drafted by Kate Hunter.
Relief shown by spot heights. "Base map compiled and edited by the U.S. Geological Survey ... Railroads updated to 1982." "Production of this map was funded in part by the U.S. Bureau of Land Management and the Illinois Coal Association." Includes inset showing sources of information and 1 other inset.
- Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey
- Held by
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