551 | An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset |
552 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
553 | Old Bedford incorporating the Middle Level and Ouse Washes : consultation report - May 1997 |
554 | Discharge consents and compliance : the NRA's approach to control of discharges to water |
555 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
556 | Aldrin and dieldrin concentrations in the Newlyn catchment during 1991 an interim report |
557 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
558 | Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995 |
559 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
560 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
561 | Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey |
562 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
563 | An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report |
564 | Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay |
565 | Herbicides for use in or near the aquatic environment: Priorities for Environmental Quality Standards Development |
566 | Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales |
567 | An investigation of the Madford River pollution incident of 29 July 1989 : November 1989 |
568 | Devon area internal report - measurement of dissolved oxygen levels in the Dart estuary - March 1996 |
569 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
570 | The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria |
571 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
572 | Analysis of bacteriological contamination and accumulation of metals and organics in the mussel (Mytilus edulis) |
573 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
574 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
575 | Impact assessment of scour valve test at Roadford Reservoir on water quality of the River Lyd |