TY - BOOK AU - Leonard, Joseph W. AU - Mitchell, David Ray TI - COAL PREPARATION U1 - 662.623 PY - 1968/// CY - New York PB - American Institute Of Mining, Metallurgical And Petroleum Engineers KW - Coal Preparation N1 - Previous Editions Edited By D. R. Mitchell; Sponsored By The Seeley W. Mudd Memorial Fund ER -