The Pittsburgh no. 8 and Redstone no. 8A coal beds in Ohio The Pittsburgh no. eight and Redstone no. eight A coal beds in Ohio De Long, Richard M. creator Ohio Division of Geological Survey. text bibliography ohu Columbus State of Ohio, Dept. of Natural Resources, Division of Geological Survey 1955 monographic eng
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49 p. : ill., maps (some col.) ; 28 cm. by Richard M. DeLong. Includes bibliographical references (p. 48-49). n-us-oh Coal Ohio Coal mines and mining Ohio QE151 .A186 no. 26 ONR 84.19:26 ONR 84.19:26 Report of investigations (Ohio. Division of Geological Survey) ; no. 26 gs 56000081 DLC 720217 20260227111403.0 gs 56000081