Saxena, vyom  Saxena, Ved Prakash <br/><br/>
Understanding Science - Part - IV/ 
vyom Saxena,  Ved Prakash Saxena 
 - New Delhi:  Pitambar Publishing Company,  1992 
 - 112p 
<br/><br/><label>ISBN: </label>8120906748 
<br/><br/><label>Dewey Class. No.: </label>500  / SAX