Use of Algae for Monitoring Rivers. Edited by B.A. Whitton, E. Rott and G. Friedrich (1991). Aquatic Insect Ecology, Volume 1. Biology and Habitat by J.V. Ward (1992). Biology of Cladocera. Edited by V. Korinek & D.G. Frey (1991). Eutrophication of Freshwaters; Principles, Problems and Restoration by D. Harper (1992). Early Life History of Fish: An Energetics Approach by Ewa Klamer (1992). River Projects and Conservation: A Manual for Holistic Appraisal. Edited by J.L. Cardiner. (1992). Dynamic Aquaria —Building Living Ecosystems. W.H. Adey & K. Loveland (1991). A Natural History of the Lakes, Tarns and Streams of the English Lake District. G. Fryer (1991). Sulphur Cycling on the Continents. Wetlands, Terrestrial Ecosystems, and Associated Water Bodies. Edited by R.W. Howarth, J.W.B. Stewart & M.V. Ivanov (1992).
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