TY - BOOK AU - Pontolillo, J. AU - Stanton, R. W. CN - I 19.76: CY - [Reston, Va.] : CY - [Denver, Colo. : DA - 1994] ID - 184503 KW - Coal KW - Coal mines and mining N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 95-0621-M. PB - U.S. Dept. of the Interior, Geological Survey ; PB - Open-File Reports Section, distributor, PP - [Reston, Va.] : PP - [Denver, Colo. : PY - 1994] T1 - Coal petrographic laboratory procedures and safety manual II TI - Coal petrographic laboratory procedures and safety manual II VL - 94-631 ER -