Hess, Frank L. <br/><br/>
Nickel in 1915. 

 - Washington, D.C.  Government Printing Office  1917 
 - pp. 743-766 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA