Chugh,C. P. <br/><br/>
Manual of drilling technology. 
P Chugh 
 - New Dehli   Oxonian press private limited; 1985. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drilling Technology
<br/><br/><label>LC Class. No.: </label>TA 743 .C58