Gaul Robert B Tr. <br/><br/>
Transformation of petrolium in nature 

 -  1968 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>46509 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H1555, K8