Collins national encyclopedia; 
edited by J.B. Foreman. 
 - London :  William Collins Sons & Co.  1966 
 - x, 469 p.  ill.  22 cm. 
<br/><br/> Vol. 11: Revision service. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.
<br/><br/><label>LC Class. No.: </label>AE5