United state 

 - PennWell  74 p. :ill. ; 27 cm. 
 - Petroleum industry and trade--Periodicals.    
<br/><br/><label>ISSN: </label>TN 860 .O35/ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SR
<br/><br/><label>LC Class. No.: </label>Oil and gas journal