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6programme and meeting document bibliotecaUNESCO
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7by Tahir, A.A., Executive Organ for the Development Projects in Jonglei Canal Area, Khartoum (Sudan) eng, Sammani, M.O.
Published 1978Texto bibliotecaFAO IT -
8by El Sammani, M.O., Economic and Social Research Council, Khartoum (Sudan) eng, Abdalla, B., El Tayeb, G., Suliman, M.M.
Published 1984Texto bibliotecaFAO IT