00429    a2200133   4500020001500000082001500015100001700030245011900047260003000166300001800196440003800214650002300252700002000275  a9290901195  a631.7bRAB  aRaby, Namika  aProfessional management in irrigation systemsba case study of performance control in mahaweli system H, Sri Lanka  aColombobIIMIc1989g1989  axx,95p.c25cm  aIIMI Country Paper Sri Lanka No.1  aWater Conservation  aMerrey, Douglas