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1by National Irrigation Administration, Sri Lanka, International Irrigation Management Institute
Published 1991Book bibliotecaCGIAR -
2by National Irrigation Administration, Sri Lanka, International Irrigation Management Institute
Published 1991Book bibliotecaCGIAR -
3by National Irrigation Administration, Sri Lanka, International Irrigation Management Institute
Published 1991Book bibliotecaCGIAR -
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7by International Irrigation Management Institute, Mandala Development Corporation, National Irrigation Administration, Sri Lanka, United States Agency for International Development
Published 1991Book bibliotecaCGIAR