Sourcebook of alternative technologies for freshwa - Daka DHI 1998 - 182p cm. - "Its, Technical Publication Series; 8e. United Nations Environment Programme, Water Branch. Danish Hydraulic Institute" . Standard No.: 4800 Source: Reports Subjects--Topical Terms: Water SupplyIndustrial Economics Dewey Class. No.: "X9(D85)0gF.4.N9, N8/UN"