Watts, W.F. <br/><br/>
An introduction to the mine inspection data analysis system (MIDAS) 
Watts, W.F. 
 - Washington  Bureau of mines  1981 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>PROGRAMA DE COMPUTADORA
<br/><br/><label>Universal Decimal Class. No.: </label>622:044.51