00762pam a2200205 a 4500020001500000020002200015040000800037082002600045100001800071245006000089260010500149300004000254500010500294650002500399650001800424650002000442700002100462710003100483710004200514  a0582063302  a047021709X (U.S.)  cDLC00a628 JWI 1991 A039 Or.1 aLloyd, Barry.10aSurveillance of drinking water quality in rural areas /  aBurnt Mill, Harlow, Essex, England :bLongman Scientific & Technical ;aNew York :bJ. Wiley,c1991.  axvi, 171 p. :bill., maps ;c24 cm.  a"Published on behalf of the World Health Organization and the United Nations Environment Programme." 0aWater-supply, Rural. 0aWater quality 0aDrinking water.1 aHelmer, Richard,2 aWorld Health Organization.2 aUnited Nations Environment Programme.