NCERT <br/><br/>
Science   :Textbook for Class IX / 
NCERT 
 - New Delhi  :NCERT,  2006 
 - iv,218p. 
<br/><br/><label>ISBN: </label>81-7450-492-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Science-textbook-class 9th
<br/><br/><label>Dewey Class. No.: </label>500 N213S