Levorsen, A. I.,  1894-1965. <br/><br/>
Geology of petroleum / 
A.I. Levorsen. 
 - 2nd ed. 
 - San Francisco :  W.H. Freeman,  1967. 
 - x, 724 p. :  ill. 
 - A series of books in geology. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum--Geology.