TY  - BOOK
AU  - S. S. Purohit, Q.J. Shammi, AK. Agrawal
AU  - Shammi, Q.J, Agrawal, A.K.
TI  - Environmental Science: A New Approach 
SN  - 9788177542103
U1  - 577 
PY  - 2012///
CY  - Jodhpur
PB  - Agrobios
ER  -