The new encyclopaedia Britannica :  macropaedia : knowledge in depth 

 - Fifteenth edition 
 - Chicago :  Encyclopedia Britannica, inc,  1975 
 - volumes :  illustrations ;  29 cm 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries
<br/><br/><label>LC Class. No.: </label>AE5 N4946