P.R.vd; ed <br/><br/>
Encyclopaedia of environmental sciences    environmental industrial pollution control 4-  Vol- 11 

 - New Delhi<br/>  Akashdeep Publishing House  1992 
 - al in various pagings 
<br/><br/><label>ISBN: </label>8171582796 
<br/><br/><label>Dewey Class. No.: </label>333.703  / ENC