"Shortage of coal in the northern Appalachian coal field."; "White, I. C. (Israel Charles), 1848-1927."; "Coal--United States.", "Coal mines and mining--United States.", "Coal--Appalachian Region.", "Coal mines and mining--Appalachian Region."; "White, I. C. (Israel Charles), 1848-1927."; "1909"; "

Journal article reprint from: Bulletin of the Geological Society of America, v.20.

"; ""; "P1043"; "pec"; "Coal--United States.", "Coal--Appalachian Region.", "Coal mines and mining--United States.", "Coal mines and mining--Appalachian Region."; "14256"; .