by Azuma TsunodaDirectorate General of Cooperative Business Promotion, Ministry of Cooperatives1991
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by Koji InoueDirectorate of Irrigation II, Directorate General of Water Resources Development, Ministry of Public Works, Republic of Indonesia1990
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by Yoshimi DokyuSenior Expert in Irrigation Engineering, Directorate of Irrigation I, D.G.W.R.D., Ministry of Public Works1988
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Masahiro SuzukiConstruction Guidance Service Center Project1988
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