Appropriate technology for water supply and sanitation : technical and economic options. Vol.1A : a summary of technical and economic options.
Kalbermatten, John M. & otherrs
Appropriate technology for water supply and sanitation : technical and economic options. Vol.1A : a summary of technical and economic options. - Washington D.C. World Bank 1980 - viii,40p.
628.1 / KAL
Appropriate technology for water supply and sanitation : technical and economic options. Vol.1A : a summary of technical and economic options. - Washington D.C. World Bank 1980 - viii,40p.
628.1 / KAL