TY  - GEN
AU  - Vasudevan,N.
TI  - Essentials of  environmental science
SN  - 09788173197062
PY  - 2006///
CY  -  New Delhi : 
PB  - Narosa Publishing House
KW  - Environmental sciences
KW  - Ecosystems
KW  - Environmental Management
N1  - Includes bibliography & index
ER  -