Eckel, Edwin C.  1875-1941. <br/><br/>
Portland cement materials and industry in the United States, 
by Edwin C, Eckel, with contributions by Ernest F. Burchard and others. 
 - Washington,  Govt. print off.,  1913. 
 - 401 p.  maps (part fold.) diagrs.  24 cm. 
 - U.S. Geological survey. Bulletin 522 .
<br/><br/>Contains bibliographies. 
<br/><br/><label>LCCN: </label>gs 13000362  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Portland cement.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 522