Levorsen, <br/><br/>
Geology of Petroleum  Textual Documents 
A.I.Levorsen 
 - Ist ed - 1985. 
 - New Delhi  CBS Publishers & Distributors 
 - 724p:  23cm. 
<br/><br/><label>ISBN: </label>81-239--0931-4 
<br/><br/><label>Subjects--Index Terms: </label>Economic geology Dept - Geol 
<br/><br/><label>Dewey Class. No.: </label>553