Ziegler, Victor. <br/><br/>
Popular oil geology/ 
Victor Ziegler. 
 - 2nd ed 
 - New York:  Wiley,  1920 
 - 171 p.:  ill.;  23cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9780548830277 
<br/><br/><label>Dewey Class. No.: </label>553.28  / Z66