Thomas, Leon J. <br/><br/>
An introduction to mining: exploration, feasibility, extraction, rock mechanics 

 - Sydney  Methuen of Australia  1978 
 - 471 p.  ilus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EXPLORACION MINERA<br/>MECANICA DE ROCAS<br/>MINERIA<br/>MINERIA A CIELO ABIERTO<br/>MINERIA SUBTERRANEA
<br/><br/><label>Universal Decimal Class. No.: </label>622/T48