Morgan, Peter R. Mara, D. Duncan
Ventilated improved pit latrines - Washington World Bank 1985 - 47p. : ill., photos
TAG Discussion paper ; no.1
Public Health
Latrines
628.42(689.1) / M6
Ventilated improved pit latrines - Washington World Bank 1985 - 47p. : ill., photos
TAG Discussion paper ; no.1
Public Health
Latrines
628.42(689.1) / M6