TY  - BOOK
AU  - Rana, S.V.S.
TI  - Essentials of Ecology and Environmental Science
SN  - 8120323203
U1  - 628 RAN 
PY  - 2003///
CY  - New Delhi
PB  - Prentice Hall of India
KW  - Environmental science
KW  - Ecology
ER  -