Jones, L.M. <br/><br/>
Sumary of mineral production in foreign countries 1919 and 1920. 

 - Washington, D.C.  Government Printing Office  1923 
 - pp. 513-564 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA
<br/><br/><label>Dewey Class. No.: </label>