Encyclopaedia Britannica Volume 20 / 

 - Chicago :   William Benton Publisher,  1768 
 - 1193p :  ills.;  28cm. 
 - Encyclopaedia Britanica .
<br/><br/><label>ISBN: </label>0852291736 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopaedias  - general 
<br/><br/><label>Dewey Class. No.: </label>030  / BRI