Katyal, Timy, <br/><br/>
Environmental  Pollution 

 - 1st /   1996. 
 - Delhi:  Anmol  Publications  Pvt.  Ltd,  1996. 
 - 302p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Botany., Pollution. 
<br/><br/><label>Dewey Class. No.: </label>628.168