TY  - BOOK
AU  - Chawla, P. S 	
TI  - Recent studies and researches in environment science /			
SN  - 9788189979652
U1  - 333.7 CHA 
PY  - 2008///
CY  - New Delhi : 
PB  - Pearl Books ,	
N1  - Includes Index.
ER  -