TY  - BOOK
AU  - Tyagi, O. D. and Mehra, M.
TI  - A textbook of environmental chemitry
SN  - 8170413524
U1  - 577.14 
PY  - 1990///
CY  - New Delhi
PB  - ; Anmol Publications
KW  - Ecology
KW  - Environmental Chemistry
ER  -