Wong, Yew Choong <br/><br/>
Rare-earth and ultrum mineral-geology, industrial processing and applications 
Wong Yew Choong. 
 -  1983 
 - 8p.  ill.  30cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy--Rare earth ultrum--Malaysia
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Malaysia