Eitemau Tebyg: Water supply and sewerage /
Pwnc: Water-supply engineering.
Pwnc: Sewerage.
- Wastewater engineering : treatment, disposal, and reuse /
- Wastewater engineering : treatment and reuse /
- Wastewater Engineering : Treatment and Resource Recovery Volume 1 /
- Wastewater engineering : treatment and resource recovery volume 2 /
- Water supply and sewerage /
- Wastewater engineering : treatment, disposal, and reuse /