Hodge, James Michael, 1850- Report on the upper Cumberland coal field. The region drained by Poor and Clover Forks in Harlan and Letcher Counties. - [n.p.] Printed by the Interstate Pub. Co., 1912. - ix, 223 p. ills., maps (1 fold.) 27 cm. LCCN: gs 13000108 Subjects--Topical Terms: Coal--Kentucky. LC Class. No.: QE115 / .A243 no. 13