SINGH,B <br/><br/>
INTERNATIONAL SYMPOSIUM ON UNDERGROUND ENGINEERING PROCEEDINGS 

 - 2 
 - NEW DELHI  Oxford & IBH Publishing  1989 
 - 29X22 
<br/><br/><label>ISBN: </label>81-204-0303-7 
<br/><br/><label>Dewey Class. No.: </label>622.2 S617