Cheng, Helena  2012 <br/><br/>
Top of the Pack: science examination papers :  modelled after top school's examination papers / 
Helena Cheng 
 - Singapore ;  Educational Publishing House Pte Ltd  2012 
 - 160 pages :  ill. ;  31 cm. 
<br/><br/><label>ISBN: </label>978-981-4395-88-5 
<br/><br/><label>Dewey Class. No.: </label>500   / C41