Appropriate sanitation alternatives for low-income communities :
Mara, David Duncan.
Appropriate sanitation alternatives for low-income communities : a brief introduction / Sanitation alternative for low-income communities : a brief introduction by Duncan Mara. - Washington, D.C. : World Bank, 1982. - 50 p. - Appropriate technology for water supply and sanitation ; no. 1b .
eng.
Sanitation.
Water supply.
Developing countries.
WA 670
Appropriate sanitation alternatives for low-income communities : a brief introduction / Sanitation alternative for low-income communities : a brief introduction by Duncan Mara. - Washington, D.C. : World Bank, 1982. - 50 p. - Appropriate technology for water supply and sanitation ; no. 1b .
eng.
Sanitation.
Water supply.
Developing countries.
WA 670