1. Gardiner J. andMance G.United Kingdom Water Quality Standards arising from European Community Directives.WRc Report TR 204 1984.
2. National Rivers Authority.Discharge Consent and Compliance Policy: A Blueprint for the Future.Water Quality Series No 1 NRA London 1990.
3. Mount D. I.The role of biological assessment in effluent control. InProc. of Int. Workshop on Biological Testing of Effluents 10–14 September1984 Duluth Minnesota USA.Organisation for Economic Cooperation and Development United States Environmental Protection Agency and Environment Canada 15–30.
4. Sloof W. Van Leeuwen C. J. andVanDonk E.Use of biomonitoring in water quality regulatory decisions.Ibid. p.61.
5. Hanmer R. W. andNewton B. J.1984 Utility of effluent toxicity tests from the US regulatory perspective.Ibid. p.353.