Praveen, Naushaba <br/><br/>
Paryavaraniya adhayan ek bahuayami vishaya 

 - New Delhi  R K Books  2014 
 - 218 p. 
<br/><br/> 1660 05/11/2014 IN1512 10/11/2014 Main Budget 
<br/><br/><label>ISBN: </label> RS450 
<br/><br/><label>Dewey Class. No.: </label>363.7 P259P