Wright, Calvert Charles,  1905- <br/><br/>
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 .
<br/><br/>"References": p. 31-32. 
<br/><br/><label>LCCN: </label>gs 39000136  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrogenation.<br/>Coal--Pennsylvania.
<br/><br/><label>LC Class. No.: </label>TP326.U6  / P49