Ventilated improved pit latrines recent developments in Zimbabwe
| Váldodahkki: | |
|---|---|
| Materiálatiipa: | Girji |
| Giella: | eaŋgalasgiella |
| Almmustuhtton: |
Washington
Technology Advisory Group, World Bank
c1982.
|
| Ráidu: | World Bank technical paper
3 Technology Advisory Group working paper 2 |
| Fáttát: |