DK online science encyclopedia / 
editor : Steven Carton. 
 - Rev. and updated edition 
 - London :  D. Kindersley,  c2009. 
 - 384p. : col. il. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Encyclopedias, juvenile<br/>Engineering--Encyclopedia.<br/>Technology--Encyclopedia, juvenile.