Encyclopaedia Britannica. 

 - 15th ed. 
 - Chicago :  Encyclopaedia Britannica,  1990. 
 - 32 v. :  ill. ;  28 cm. 
<br/><br/> Vols. 1 to 12: Micropaedia ; vols. 13 to 29: Macropaedia ;  Propaedia (1 vol.) ; Index (2 vols.).  The fifteenth ed. (1990) published under title: The New encyclopaedia Britannica. 
<br/><br/><label>ISBN: </label>0852295111 
<br/><br/><label>LCCN: </label>90054193 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.