Parker, Edward W. <br/><br/>
The production of coal in 1913. 

 - Washington, D.C.  Government Printing Office  1914 
 - pp. 709-928 
 - Mineral Resources of the United States, calendar year 1913-Part II .
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>CARBON
<br/><br/><label>Subjects--Index Terms: </label>PRODUCCION DE CARBON 
<br/><br/><label>Dewey Class. No.: </label>553.2