TY  - BOOK
AU  - Ahluwalia, V K
TI  - Environmental studies: Basic concepts 
SN  - 9788179933213
U1  - 333.7 
CY  - New Delhi 
PB  - The Energy and Resources Institute 
KW  - Ecosystems
KW  - Biodiversity
KW  - Pollution
KW  - Social issues
ER  -