TY  - BOOK
AU  - MEHRA, M.
AU  - TYAGI, O.D.
TI  - TEXTBOOK OF ENVIRONMENTAL CHEMISTRY
SN  - 81 7041 352 4
U1  - 577.14 
PY  - 1996///
CY  - New Delhi
PB  - Anmol Publications Pvt. Ltd., New Delhi 
ER  -