01318cam a22002894a 4500 gs 39000136 DLC 20260227111344.0 790824s1939 paua s000 0 eng gs 39000136 (OCoLC)5306960 DLC MsSM DLC premarc TP326.U6 P49 Wright, Calvert Charles, 1905- Hydrogenation of the petrographic constituents of Pittsburgh seam coal, by C. C. Wright and George C. Sprunk. Joint investigation with the United States Bureau of Mines, Pittsburgh Experiment Station and made possible through the financial assistance rendered by Bituminous Coal Research, inc. State College, Pa. The Pennsylvania State College, School of Mineral Industries, 1939. 32 p. illus., tables, diagrs. 23 cm. Pennsylvania. State College Mineral Industries Experiment Station. Bulletin 26. The Pennsylvania State College bulletin, vol. XXXII, no. 26, May 30, 1939 "References": p. 31-32. Hydrogenation. Coal Pennsylvania. Sprunk, G. C. (George C.), 1905-1995. Pittsburgh Experiment Station (United States. Bureau of Mines) Bituminous Coal Research, inc. 27540 27540