TY  - BOOK
AU  - Rana, S.V. S. 
TI  - Essentials of ecology and environmental science
SN  - 9788120327733
U1  - 577 R15e2 
PY  - 2005///
CY  - New Delhi
PB  - Prentice-Hall
KW  - Environmental sciences
KW  - Ecology
KW  -  Human ecology
ER  -