Wo kuo ti yu s?e chin shu kung yeh.  

 -  1956.  
 - 28 p  illus  19 cm. 
<br/><br/> Romanized.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nonferrous metals.
<br/><br/><label>LC Class. No.: </label>TN758  / .C55