Petri, D. <br/><br/>
Petroleum /    
D. Petri. 
 - Oxford :   The University Press,   1961. 
 - 86 p. :    illus. ;    23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum.--------
<br/><br/><label>Dewey Class. No.: </label>665.5 PET