Eighth world petroleum congress  : proceedings. Vol.7 

 - London  : Applied Science Publishers Ltd  , 1971. 
 - vi,94p.  : ill.  ; 30cm. 
 -  Vol. 7 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum
<br/><br/><label>LC Class. No.: </label>QTO TN863.W6 Vol.7