The New book of knowledge 

 - New York :  Grolier,  1973 
 - 20 v. :  ill., maps ;  26 cm. 
<br/><br/><label>ISBN: </label>0717205045 (set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's encyclopedias and dictionaries<br/>Encyclopedias and dictionaries
<br/><br/><label>Dewey Class. No.: </label>R 031  / Ne532 1973