00465    a2200133   4500082001500000100002400015245010900039260006600148300001900214440002600233650002400259650002600283700002200309  a627.8bABE  aAbeyratne, Shyamala  aChange and continuity in village irrigation systems ba case study in the Moneragala district Sri Lanka   aColombobAgrarian Research and Training Institutec1986g1986  aix,153p.c29cm  aResearch study No. 75  aDAMS AND RESERVOIRS  aHYDRAULIC ENGINEERING  aPerera, Jayantha