"Annual shipments from the Logan County, W. Va., coal field, 1905 to 1920, inclusive, by mines."; "Logan Coal Operators Association."; "Coal trade--West Virginia--Logan County--Statistics.", "Coal mines and mining--West Virginia--Logan County--Statistics."; "Logan Coal Operators Association."; "undated"; "

Chart. Includes map of the location of mines in Logan Coal Field.

"; ""; "P2581"; "pec"; "Coal mines and mining--West Virginia--Logan County--Statistics.", "Coal trade--West Virginia--Logan County--Statistics."; "14256"; .