Patnaik, Prabhat. <br/><br/>
A Text book  of  Environmental  Science 

 - 1st /   2012. 
 - Delhi:  Wisdom  Press,  2012. 
 - 340p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Environmental .Science, Environment . Science. 
<br/><br/><label>Dewey Class. No.: </label>333.701