TY  - BOOK
AU  - Balamurugan,S.
TI  - A text book of environmental science
SN  - 9788190770583 (pbk)
U1  - 372.357 
PY  - 2008///
CY  - Chennai
PB  - Puthaga Poonga
KW  - Environmental sciences
KW  - Ecology
KW  - Environmental pollution
ER  -