Ardley, Neil. <br/><br/>
Infinitys Encyclopaedia of Science :  including more than 100 science projects & qizzea. 

 - 2n ed. 
 - New Delhi :  Pritha Offsets Pvt. ltd.  2001. 
 - 552 p.  ill.  25 cm. 
<br/><br/>includes index. 
<br/><br/><label>ISBN: </label>8187233079 
<br/><br/><label>Dewey Class. No.: </label>REF 503 ARD