Young people's science encyclopedia 

 - Chicago  Childrens Press   1963 
 - 20 v.  illus. (part col.) col. maps, ports.  26 cm. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Dictionaries.
<br/><br/><label>Dewey Class. No.: </label>Ref 030 Y9 1963 v.1