TY  - BOOK
AU  - Okun D A
AU  - Ponghis George
TI  - Community wastewater collection and disposal
U1  - 628.3 
PY  - 1975///
CY  - Geneva
PB  - World Health Organization
KW  - Disposal
KW  - Sewage treatment
KW  - Water-supply engineering
ER  -