Johnson, Thys B. <br/><br/>
Improving returns from mine products through use of operations research techniques 
Johnson, Thys B. 
 - Washington  Bureau of Mines  1969 
 - ii, 78 p.  il  26 cm  1 map 
 - RI  7230 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>operations research
<br/><br/><label>Subjects--Index Terms: </label>Mineral industries Production standards 
<br/><br/><label>Universal Decimal Class. No.: </label>66