000 003030000a22001210004500
999 _c62950
_d62950
041 _aeng
080 _a626.81(548.7)
_bA2
942 _cBK
100 _aAbeyratne, S.
100 _aPerera, Jayantha
245 _aChange & continuity in village irrigation systems
260 _aColombo
_bARTI
_c1986