Katyal, Timmy <br/><br/>
Environmental pollution 
by Timmy Katyal and M. Satke 
 - Delhi  Anmol  1989 
 - 302 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>O91 K159