Johnson, Bertrand Leroy <br/><br/>
Tin in 1921. 

 - Washington, D.C.  Government Printing Office  1922 
 - pp. 71-73 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA
<br/><br/><label>Dewey Class. No.: </label>