Barnes, John W. <br/><br/>
Ores and minerals :  introducing economic geology / 
J. W. Barnes 
 - Milton Keynes :  Open University,  1988 
 - 181 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0335152139 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Economic