TY  - BOOK
AU  - Rana, S.V.S
TI  - Essentials of ecology and environmental science
SN  - 9788120333000
U1  - 577.2 
PY  - 2007///
CY  - New Dehli
PB  - Pretice Hall of India
KW  - Ecology
KW  - Ecosystems
KW  - Biodiversity
KW  - Environmental science
ER  -