World book 2011 :  yearbook. 

 - Chicago, IL :  World Book, Inc.,  c2011. 
 - 495 p. :  some col. ill. ; 
<br/><br/><label>ISBN: </label>9780716605058  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias.<br/>Yearbooks.
<br/><br/><label>Dewey Class. No.: </label>031