The ultimate how it works encyclopedia    

 - Nottinghamshire :  Horus Editions,   2002    
 - 366p. :  ill.;   31cm    
<br/><br/>Includes index    
<br/><br/><label>ISBN: </label>9781899762569    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Encyclopedias,juvenile