Training module on quarry operations Rock drilling 

 - Colombo  ICTAD  1996 
 - 145p. 
 - .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINARAL<br/>MINE EXCAVATIONS<br/>MINING<br/>ROCK DRILLING
<br/><br/><label>Universal Decimal Class. No.: </label>622.24  / ICT