Schoeller, W. R. <br/><br/>
The analysis of minerals and ores of the rarer elements :  a manual for analytical chemists, metallurgists, and advanced students / 
by W.R. Schoeller and A.R. Powell 
 - 3rd ed. 
 - London :  Griffin,  1955. 
 - 408 p. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rare earths.