Harnam Singh <br/><br/>
B.Sc Practical physics 

 - rev. ed. 
 - Delhi  S. Chand & co.  1994 
 - xvi, 498p.  23 cm. 
<br/><br/><label>ISBN: </label>8121906166 
<br/><br/><label>Dewey Class. No.: </label>530.078,  / D, Har