TY  - BOOK
AU  - Raj Kr Pruthi
TI  - Changing environment  
SN  - 81-89557-29-7
U1  - 363.73 
PY  - 2006///
CY  - New Delhi
PB  - Arise
KW  - Ecology
KW  - Environment
KW  - Air pollution
N1  - Includes index
ER  -