Jones, W. R,    1880- <br/><br/>
Minerals in industry/  
by W.R. Jones 
 - Harmondsworth :    Penguin Books,    1943, repr. 1945. 
 - viii, 149 p. :    ill., maps ;    18 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Mines and mineral resources.
<br/><br/><label>Dewey Class. No.: </label>549 JON