Prasad .N.K <br/><br/>
An Introduction To Earth Scince 

 - 4th Ed 
 - New Delhi  Vikas Publishing House  1996 
 - 167pg 
<br/><br/><label>ISBN: </label>0-7069-8629-6 
<br/><br/><label>Dewey Class. No.: </label>910.55