Yen, Teh Fu, 1927-  Yen, Teh Fu, 1927- <br/><br/>
The role of trace metals in petroleum / 
T.F. Yen. 
 - Ann Arbor :  Ann Arbor Science Publishers,  [1975] 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0250400618 
<br/><br/><label>LCCN: </label>74077404 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum -- Analysis.--Petroleum -- Analysis.<br/>Trace elements -- Analysis.--Trace elements -- Analysis.
<br/><br/><label>LC Class. No.: </label>TP691  / .Y46 
<br/><br/><label>Dewey Class. No.: </label>665/.5