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951An investigation of sewage on the beach at Porthcothan
952Assessing and controlling the ecotoxicity of complex effluents
953Charging for discharges scheme : guidance to the engineering industry
954Charging for discharges scheme : guidance to the power generation industry
955The Test catchment southern : recommendations for statutory water quality objectives
956A survey of ferruginous minewater impacts in the Welsh coalfields
957A survey of ferruginous minewater impacts in the Welsh coalfields
958Dioxins and the River Doe Lea : plain English report
959Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report
960Narrowboats on the Thames : useful hints and tips
961Locks and weirs on the river Thames : how do they work?
962Second annual review of the Lower Bristol Avon catchment management plan
963Second annual review of the Upper Bristol Avon catchment management plan
964The River Avon and its tributaries near Malmesbury : river management studies
965Fishery survey of the Bridgwater and Taunton Canal
966The quality of rivers and estuaries in Northumbria region 1990
967A guide to sustainable urban drainage : protecting the quality of our environment
968Air dispersion climate from the Castle Cement works at Ribblesdale
969Estuarial migration of Atlantic salmon in the river Dee (North Wales)
970Pesticide residues in fish taken from the Newlyn River (1992)
971A Review Of The Impact Of Microbiological Contaminants In Groundwater
972Environmental screening for the Merseyside objective 1 programme : environmental screening guidelines
973Environmental statement for the River Wandle flood alleviation scheme contract one (C1)
974Cyanobacteria (blue-green algae) in the south west region 1989
975Toxic blue-green algae : a report by the National Rivers Authority