TY  - BOOK
AU  - Helmet, Fritz
TI  - Environmental chemistry
SN  - 81-7890-077-7
CY  - Delhi
KW  - Acid mine drainage
KW  - Air pollution
KW  - Chemistry -- Environment
KW  - Environmental chemistry
KW  - Eutrophication
KW  - Heavy metals
KW  - Thermal pollution
KW  - Waste water treatment
KW  - Water pollution
ER  -