The 1981 World book year book :   the annual supplement to the World book encyclopedia / 
 The World book year book, 1981. 
William H. Nault, Editorial editor 
 - Chicago :   World Book-Childcraft International,  1981. 
 - 608 pages :   illustrations ;   26 cm 
<br/><br/> Includes index.<br/>At head of title: "A review of the events of 1980."<br/>Spine title: Year book, 1981. 
<br/><br/><label>ISBN: </label>0716604817 9780716604815 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enciclopedias y diccionarios.
<br/><br/><label>LC Class. No.: </label>R AG 5  / W927 1981 
<br/><br/><label>Dewey Class. No.: </label>031