KARANAM,U.M.R <br/><br/>
PRINCIPLES OF ROCK DRILLING 

 - NEW DELHI  Oxford & IBH Publishing  1998 
 - 265p.,24X15Cms. 
<br/><br/><label>ISBN: </label>81-204-1275-3 
<br/><br/><label>Dewey Class. No.: </label>622.23 K18