TY  - GEN
AU  - Rana,S.V.S
TI  - Essentials of ecology and environmental science
SN  - 812032773X
U1  - 574.5 
PY  - 2005///
CY  - New Delhi
PB  - Prentice-Hall
KW  - ECOLOGY
KW  - ENVIRONMENTAL POLLUTION
KW  - ENVIRONMENTAL PROBLEMS
KW  - ENVIRONMENTAL SCIENCE
KW  - SOCIAL PROBLEM
ER  -