TY  - BOOK
AU  - Tiwari, Manoj
AU  - Khulbe, Kapil
AU  - Tiwari, Archana
TI  - Environmental studies
SN  - 8188237825
U1  - 363.7 
PY  - 2007///
CY  - New Delhi
PB  - I.K. International
KW  - Environmental protection
KW  - Environmental pollution
ER  -