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576Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments
577Land use practices and pathways of pesticide residues in the Mount's Bay catchment, Cornwall
578An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset
579Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales
580Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997
581Discharge consents and compliance : the NRA's approach to control of discharges to water
582Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority
583Aldrin and dieldrin concentrations in the Newlyn catchment during 1991 an interim report
584Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999
585Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995
586An audit of performance in the processing of macro-invertebrate samples in 1992
587Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level
588Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey
589The available resource methodology : a framework for assessing water resources and abstraction availability : final report
590An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report
591Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay
592Herbicides for use in or near the aquatic environment: Priorities for Environmental Quality Standards Development
593Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales
594An investigation of the Madford River pollution incident of 29 July 1989 : November 1989
595Devon area internal report - measurement of dissolved oxygen levels in the Dart estuary - March 1996
596Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales
597The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria
598Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000
599Analysis of bacteriological contamination and accumulation of metals and organics in the mussel (Mytilus edulis)
600Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority