Book reviewed in this article:Beadle, L.C. (ed.) (1981) The Inland Waters of Tropical Africa: An Introduction to Tropical Limnology.Shang, Y.C. (1981) Aquaculture Economics: Basic Concepts and Methods of Analysis.Say, P.J. and Whitton, B.A. (eds) (1981) Heavy Metals in Northern England: Environmental and Biological Aspects.
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