00759nam a2200217Ia 450000100060000000300050000600500170001100800410002801000150006902000150008405000210009908200230012024501300014326000320027330000290030549000390033450400510037365000510042470000360047570000300051130071BIBL20160527183854.0821201s1983    nyua     b    00100 eng    a 82023466   a08247188440 aTN803b.B33 19830 a622/.3382/068521900aBasic mathematics and computer techniques for coal preparation and miningcedited by Kenneth K. Humphreys, Joseph W. Leonard.0 aNew YorkbM. Dekkercc1983.  axi, 233 p.bill.c24 cm. 0aEnergy, power, and environmentv17  aIncludes bibliographical references and index. 0aCoal mines and miningxDecision making.2Local10aHumphreys, Kenneth King.2Local10aLeonard, Joseph W.2Local