New encyclopaedia of Britannica 

 - 15th 
 - Chicago  Encyclopaedia Britannica Inc. USA       1993 
 - 33v.  cm. 
<br/><br/><label>Standard No.: </label>15574 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GENERALIA
<br/><br/><label>Dewey Class. No.: </label>k1,L68, N3.1-33