Chhatwal, G. R. <br/><br/>
Encyclopaedia of Environmental  Management  (vol.-1) 
/ by G. R. Chhatwal 
 - Newdelhi:  Anmol,  1998. 
 - 799p. 
<br/><br/><label>ISBN: </label>8174886486 
<br/><br/><label>Dewey Class. No.: </label>658.409  / CHH/E