Proceedings./ 
Editor, P.J. Witt. 
 - London :   Cement and Concrete Association ,   1954. 
 - 258 p.:  illus., diagrs., plans, tables.;  26cm. 
<br/><br/>Bibliography: p. 229-246. 
<br/><br/><label>LCCN: </label>56000025 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roofs , Shell.
<br/><br/><label>LC Class. No.: </label>TH2416  / .S95 1952