00810pam a2200229 a 4500 0582063302 047021709X (U.S.) DLC 628 JWI 1991 A039 Or. Lloyd, Barry. Surveillance of drinking water quality in rural areas / Burnt Mill, Harlow, Essex, England : Longman Scientific & Technical ; New York : J. Wiley, 1991. xvi, 171 p. : ill., maps ; 24 cm. "Published on behalf of the World Health Organization and the United Nations Environment Programme." Water-supply, Rural. Water quality Drinking water. Helmer, Richard, World Health Organization. United Nations Environment Programme. EK 11775 11775 0 0 0 628_000000000000000_JWI_1991_A039_OR 0 60415 LBA LBA A039 2017-08-07 628 JWI 1991 A039 Or. A09929 2017-08-07 2017-08-07 EK