TY  - BOOK
AU  - Joshi, P. C.
AU  - Joshi, Namita.
TI  - A TextBook of Environmental Science.
SN  - 978-81-313-0456-3
U1  - 333.707 JOS. 
PY  - 2011///
CY  - New Delhi
PB  - A.P.H
ER  -