Shacklock, Barry Wilson. <br/><br/>
Concrete constituents and mix proportions / 
B. W. Shacklock. 
 - London :  Cement and Concrete Association,  c1974. 
 - vii, 102 p., fold. leaf :  ill., port. 
<br/><br/><label>ISBN: </label>0721009050  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concrete.