Die amerikanischen Zementnormen. 

 - Berlin-Charlottenburg,  Zementverlag,  1939. 
 - 106 p.  illus., diagrs.  21 cm. 
<br/><br/><label>LCCN: </label>af 48001516  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cement--Specifications.<br/>Cement--Testing.
<br/><br/><label>LC Class. No.: </label>TA435  / .A68