The children's encyclopedia . Vol.20 

 - New York:  The Grolier Society Inc,  1957. 
 - Vol.20, 7249-7607p.;  ill.;  24cm 
 - The Book of Knowledge  20 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's encyclopedia
<br/><br/><label>Dewey Class. No.: </label>030  / CHI