003810000a22001330004500003000900000005001700009020001800026110006300044245005700107264004900164300000900213041000800222650001700230PH-MaWHO20241108112058.0 a92-4-156076-2 aInternational Drinking Water Supply and Sanitation Decade. aNational decade plans : eight questions they answer. aGeneva : bWorld Health Organization,c1982. a18p. aeng aWater supply