Seventh World Petroleum Congress:   proceedings. 

 - Essex  Elsevier  1967 
 - 404p.  ill.  28cm. 
 -  Vol.4 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum<br/>Congresses
<br/><br/><label>LC Class. No.: </label>QTO TN863.W6