The Hamlyn junior science encyclopedia / 
edited by Valerie Pitt, John Daintith [and] Alan Isaacs 
 - London :  Hamlyn,  1973 
 - 256 p. :  col. ill., col. charts, col. ports. ;  31 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Juvenile literature<br/>Science--Encyclopedias, Juvenile
<br/><br/><label>Dewey Class. No.: </label>503