"RAMSDEN,EN" <br/><br/>
Calculations for GCSE Chemistry 

 -  oxford Press,,Nelson,Redspot,collins,Marshalk Cavendish,Federal  1998 
 - 95 
<br/><br/><label>ISBN: </label>9780748717385 
<br/><br/><label>Dewey Class. No.: </label>540  / T-315