"Carbon ratios of coals in West Virginia oil fields. "; "Reger, David B. (David Bright), 1882-1958."; "Carbon.", "Petroleum--West Virginia.", "Coal--West Virginia."; "Reger, David B. (David Bright), 1882-1958."; "1921"; "Journal article reprint from: Transactions of the American Institute of Mining and Metallurgical Engineers, no. 1056. \"Issued with Mining and Metallurgy, February, 1921.\"
"; ""; "P5267"; "pec"; "Coal--West Virginia.", "Petroleum--West Virginia.", "Carbon."; "14256"; .