Wilby Charles Bryan. <br/><br/>
Concrete shell roofs / 
C. B. Wilby, I. Khwaja. 
 - London :  Applied Science Publishers,  1977. 
 - XIV, 327 s. :  il. ;  23 cm. 
<br/><br/>Indeks. 
<br/><br/><label>ISBN: </label>0853345791 
<br/><br/><label>Universal Decimal Class. No.: </label>624.012.4 :  69.024.4