Griffiths, W. T. <br/><br/>
Extraction of copper from its ores. 

 - London :  J. Murray. 
 - Modern science memoirs ;  20 .
<br/><br/> Reprinted from the School Science Review, no. 63, March, 1935. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copper -- Metallurgy.--Copper -- Metallurgy.