Chemistry 12 :  A workbook for Students / 
Hebden , James A. 
 - 18th ed. 
 - Canada:  Hebden home Pub.,  2008. 
 - vi,336 p.: 
<br/><br/><label>ISBN: </label>9780968206904 
<br/><br/><label>LC Class. No.: </label>QD31.2  / .H42  2008