Encyclopedia britannica 
Editor: Goetz Philip W. 
 - 15th ed.  
 - N.Y.,  Chic. [etc.  Encyclopedia britannica Inc.  2014 
 - 1 v.  ill. 
<br/><br/><label>ISBN: </label>9781625130372 
<br/><br/><label>LC Class. No.: </label>AE5.E363 2014