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676Some guidance on the use of digital environmental data
677An investigation of sewage on the beach at Porthcothan
678Assessing and controlling the ecotoxicity of complex effluents
679Charging for discharges scheme : guidance to the engineering industry
680Charging for discharges scheme : guidance to the power generation industry
681A survey of ferruginous minewater impacts in the Welsh coalfields
682A survey of ferruginous minewater impacts in the Welsh coalfields
683Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report
684Eel and elver studies in the Severn : interim report (256/6/ST)
685Fishery survey of the Bridgwater and Taunton Canal
686A guide to sustainable urban drainage : protecting the quality of our environment
687Air dispersion climate from the Castle Cement works at Ribblesdale
688Estuarial migration of Atlantic salmon in the river Dee (North Wales)
689A Review Of The Impact Of Microbiological Contaminants In Groundwater
690Doe Lea restoration study : the work of WRc
691Environmental screening for the Merseyside objective 1 programme : environmental screening guidelines
692The NRA in business : annual review and summary accounts 1993-94
693Cyanobacteria (blue-green algae) in the south west region 1989
694Toxic blue-green algae : a report by the National Rivers Authority
695Catchment abstraction management strategies (CAMS) and the Water Framework Directive (WFD)
696Managing water abstraction : the catchment abstraction management strategy process : April 2001
697Report on monitoring of environmental quality in the Severn Estuary
698INP-integrated North Sea programme : workshop 14-15th May 1992, Rijkswaterstaat,The Hague
699Artificial recharge to groundwater in the Otter valley
700State of the environment report for Thames Region : first update 2001