Helmet, F.  . <br/><br/>
Symmetry and group theory /  
by F. Helmet. 
 - New Delhi :   Sarup & Sons ,   2005 
 - 229p ;  
<br/><br/><label>ISBN: </label>81-7625-600-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry
<br/><br/><label>Dewey Class. No.: </label>E  / P5;1