Rural ventilated improved pit latrine a field manual for Botswana
| Egile nagusia: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Washington, D.C.
IBRD/World Bank
c1983
|
| Saila: | TAG technical note
no.8 |
| Gaiak: |