00548 a2200169 4500 333.9117 WID 19192 29491 Widanapathirana, A.S. Gal Oya water management research project Seasonal report for 1983 yala season Colombo Agrarian Research and Training Institute 1984 1984 vii,30p. 29cm Occasional publication No. 31 GENERAL TOPICS OF WATER ECONOMICS OF LAND AND ENERGY OTHER NATURAL RESOURCES L 46964 46964 0 0 0 0 LEN MKDL MKDL LEN 2009-07-03 0 333.9117WID 58522 2009-07-03 00:00:00 0.00 2016-10-31 L