Land drilling & oilwell servicing contractors 
/ Petroleum Publishing Co. 
 - Okla:   Petroleum Publishing Co.,   1982 
 - 300p.  
<br/><br/><label>ISSN: </label>0748-139X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social science 
<br/><br/><label>Subjects--Index Terms: </label>Land drilling  
<br/><br/><label>Universal Decimal Class. No.: </label>R 621.95.004.5(058.7)  / M2