Burchard, Ernest F.    Davis, Hubert W. <br/><br/>
Iron ore, pig iron and Steel in 1921. 

 - Washington, D.C.  Government Printing Office  1923 
 - pp. 565-597 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA
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