Couillard, D.T. <br/><br/>
Video supplemented task training at the United States Steel Corp. Minntac Mine, Mt. Iron, MN 
Couillard, D.T. 
 - Washignton  Bureau of mines  1985 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>ACERO
<br/><br/><label>Universal Decimal Class. No.: </label>622