SINGH, B Edr. <br/><br/>
PROCEEDINGS OF INTERNATIONAL SYMPOSIUM ON UNDERGROUND ENGINEERING VOL.2; 14-17 A 

 - NEW DELHI  Oxford & IBH Publishing  1989 
 - 94P., 
<br/><br/><label>ISBN: </label>8120403045 
<br/><br/><label>Dewey Class. No.: </label>622.2 S617