MANN, H.T. Williamson, D. Water treatment and sanitation: a handbook of simple methods for rural areas in /[by] H.T. Mann and D.Williamson - 2nd ed, - London Intermediate Technology Publications 1979 - 92 p. Includes glossary & bibliography. ISBN: 090303123X Subjects--Topical Terms: Water treatment Rural areas Dewey Class. No.: 363.123 / MAN