TY  - BOOK
AU  - Helmet Fritz
AU  - Fritz Helmet
TI  - Environmental chemistry
SN  - 8178900777
U1  - 577.14 
PY  - 2003///
CY  - Delhi
PB  - IVY publishing house
KW  - Air pollution meteorology, carbon monoxide
KW  - Water pollution, detergents and oil
KW  - Waste water treatment
ER  -