"Regional metamorphism of coal in southeastern West Virginia."; "Heck, E. T. (Edward Timmel), 1909-"; "Coal--West Virginia."; "Heck, E. T. (Edward Timmel), 1909-"; "1943"; "Journal article reprint from: The Bulletin of the American Association of Petroleum Geologists, v.27:no.9 (1943:Sept.). "; ""; "P1511"; "pec"; "Coal--West Virginia."; "14256"; .