Science:  textbook for class x / 
National Council of Educational Research and Training 
 - New Delhi:  NCERT,  2006. 
 - 282 pages:  col. ill.;  27x19 cm 
<br/><br/> Gifted by Prof. Prabha Chawla (Retd. Director Professor IGNOU) 
<br/><br/><label>ISBN: </label>8174506365