Britannica lessons : chemistry elements and their classification . Book IX 

 - New Delhi :  Encyclopaedia Britannica Popular Prakashan,  2002. 
 - vi, 100p.;  28cm 
<br/><br/><label>ISBN: </label>8171549314 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry
<br/><br/><label>Dewey Class. No.: </label>540  / BRI