TY  - BOOK
AU  - Mason, Christopher
AU  - 
TI  - Biology of freshwater pollution
SN  - 0-13-090639-5
U1  - 628.394 
PY  - 2002///
CY  - London
PB  - Prentice-Hall of India
KW  - Freshwater biology- Great Britian
KW  - Water pollution
KW  - Environmental health
KW  - Pollution
KW  - Aquatic Toxicology
ER  -