Chemistry matter and its changes 
Velasco, Virginia S. 
 -  Jimczyville Publications.  2010 
 - v, 301 pages 
<br/><br/>
<br/><br/><label>ISBN: </label>978-9-71050820-4 
<br/><br/><label>Dewey Class. No.: </label>F 540 V433 2010