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Rothuis, A.J. Bastiaaansen, C. Verdegem, M.C.J. Article/Letter to editor Journal of aquaculture in the tropics 9 (1994) ISSN: 0970-0846 Possibilities for development of extensive fish farming in upland river valley systems in West Zambia. 1994 en Life Science https://research.wur.nl/en/publications/possibilities-for-development-of-extensive-fish-farming-in-upland Wageningen University & Research