National council of educational  research and training <br/><br/>
Science text book for class X 

 - New Delhi  National Council Of Educational  Research And Training  2015 
 - 281 
<br/><br/><label>ISBN: </label>81-7450-636-5 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>500