Low-cost water supply and sanitation technology: pollution and health problems. - New Delhi: World Health Organization, 1984. - v, 40 p. : fgr., tbl. ; 17 cm. - SEARO Regional Health Papers no. 4 . ISBN: 9290221739 Subjects--Topical Terms: Water-supplySu sağlama Dewey Class. No.: 333.91 / LOW 1984