Rao, Indumati <br/><br/>
Learning science Part 2 ( The World of physics and energy ) 

 - New Delhi  National Book Trust  2006 
 - 167p. 
<br/><br/><label>ISBN: </label>81-237-4776-7 
<br/><br/><label>Dewey Class. No.: </label>540  R18L