Burchad, Ernest F. <br/><br/>
Iron ore, pig iron and Steel in 1915. 

 - Washington, D.C.  Government Printing Office  1916 
 - pp. 279-342 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA