Britannica reference encyclopedia 

 - Chicago  Encyclopaedia Britannica lnc. 
 - 794 
<br/><br/><label>ISBN: </label>978-1-61535-687-4 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>R032