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Lua i Stíl Chicago (17ú heag.)Indonesia. Direktorat Jenderal Pengairan. Direktorat Perancang. Pre Reconnaissance Report on Land and Water Resources on Bengkulu Province, Sumatera, Indonesia, September 1974. [Jakarta]: Directorate of Planning & Programming, Directorate General of Water Resources Development, Ministry of Public Works and Electric Power, 1975.
Lua MLA (8ú heag.)Indonesia. Direktorat Jenderal Pengairan. Direktorat Perancang. Pre Reconnaissance Report on Land and Water Resources on Bengkulu Province, Sumatera, Indonesia, September 1974. Directorate of Planning & Programming, Directorate General of Water Resources Development, Ministry of Public Works and Electric Power, 1975.