Coal resources of Illinois. Davis, Murphysboro, and Seelyville coals [cartographic material] : with Assumption, Bell, Houchin Creek (formely Summum (No. 4)), Litchfield, coals near Makanda, Mt. Rorah, New Burnside, Reynoldsburg, Rock Island (No. 1), "Seahorne," Survant (formerly Shawneetown), Wiley, Willis, and Wise Ridge coals / compiled by Janis D. Treworgy and Margaret H. Bargh ; drafted by Kate Hunter. Raster Massachusetts Institute of Technology Public content

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