Burchard, Ernest F. <br/><br/>
Cement in 1918. 

 - Washington, D.C.  Government Printing Office  1920 
 - pp. 565-627 
 - Mineral Resources of the United States, 1918-Part II .
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>CEMENTO
<br/><br/><label>Dewey Class. No.: </label>553.68