Hackett, T. D. <br/><br/>
Multislice mining for thick western coal seams / 
by T.D. Hackett, D.L. Boreck, and D.R. Clarke. 
 - PGH [i.e. Pittsburgh] Pa. :  U.S. Dept. of the Interior, Bureau of Mines,  1989. 
 - ii, 27 p. ;  ill. 
 - Information circular .
 - Information circular (United States. Bureau of Mines) .
<br/><br/><label>LCCN: </label>89600119 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--West (U.S.)