Encyclopaedia britannica 

 - William benton  Chicago  1768 
 - 1193p.  fig., photo, table, 
 - Volume  20 .
<br/><br/><label>ISBN: </label>0-85229-173-6 
<br/><br/><label>Nat. Bib. No.: </label>3551 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Encylopedias & books of facts
<br/><br/><label>Universal Decimal Class. No.: </label>30  / THE