TY  - BOOK
AU  - Palanisamy,P.N....(et al).
AU  - 
TI  - Environmental science 
SN  - 978 81 317 7325 3
U1  - 628/E55 
PY  - 2012///
CY  - Delhi 
PB  - Pearson education 
KW  - Environmental science
KW  -   Environmental
N1  - Includes index and Bibliography and Glossasry
ER  -