Physics Part I:  textbook for class XI / 
National Council of Educational Research and Training 
 - New Delhi :  NCERT,  2017. 
 - xii, 229 pages :  col. ill.; 
<br/><br/> Gifted by Prof. Prabha Chawla (Retd. Director Professor IGNOU) 
<br/><br/><label>ISBN: </label>8174505083