Grading of concrete aggregates :  10 reports prepared for the 52nd annual meeting / 
National Research Council U.S. 
 - Washington :  Highway Research Board,  1973. 
 - iv, 128 p. :  ill. 
 - Highway research record ;  no. 441. .
<br/><br/><label>ISBN: </label>0309021723 
<br/><br/><label>LCCN: </label>93044329     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concrete.<br/>Aggregates (Building materials).