TY  - BOOK
AU  - Tiwari, B.D.
TI  - Sewage pollution and microbiology
SN  - 9788189981310
U1  - 628.1682 
PY  - 2009///
CY  - Delhi
PB  - Swastik Publications
KW  - Sewage disposal
KW  - Water pollution
ER  -