TY  - BOOK
AU  - Chitkara, M.G.
TI  - Encyclopaedia of ecology environment and pollution Vol.1: The mother earth 
SN  - 81 7024 880 9
U1  - 574.503 
PY  - 1998///
CY  - New Delhi
PB  - Aph Publishing Corporation
KW  -  Science 
KW  - Biology 
KW  - Ecology
KW  - Encyclopaedia
ER  -