River and lake basin development: proceedings of the United Nations Interregional Meeting on River and Lake Basin Development with emphasis on the Africa region ; Addis Ababa, Ethiopia, 10-15 October 1988
In: Natural resources/water series, no. 20
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In: Natural resources/water series, no. 20
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In: United Nations publication
In: ST/TCD/SER.E 9
In: Natural Resources Water Series, No. 19
In: United Nations Publication
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In: Natural resources / Water Series, 18
In: United Nations publication
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In: Natural resources / Water Series, 17
In: United Nations publication
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In: Natural resources / Water Series, 15
In: United Nations publication
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In: Natural resources/Water series 8
In: Uited Nations Publication
In: Natural resources, water series 25
In: Natural resources / Water Series, 22
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