00762nam a2200217Ia 4500 CTU_122493 210402s9999 xx 000 0 und d 627.52 A147 Abeyratne, Shyamala Rehabilitation of small-scale irrigation systems in Sri Lanka State policy and practice in two systems Shyamala Abeyratne. Colombo, Sri Lanka International Irrigation Management Institute 1990 Irrigation,Irrigation canals and flumes Management,Maintenance and repair. Sri Lanka,Ratnapura (District),Sri Lanka,Ratnapura (District) M.Loan Trung tâm Học liệu Trường Đại học Cần Thơ