| 451 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
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| 452 | Water pollution incidents in England and Wales - 1992 : report of the National Rivers Authority |
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| 453 | Monitoring of the River Burn upstream and downstream of Burnham Market sewage treatment works 1999 |
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| 454 | Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995 |
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| 455 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 456 | Development of the Acid Water Indicator Community (AWIC) Macroinvertebrate Family and Species Level |
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| 457 | Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey |
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| 458 | The available resource methodology : a framework for assessing water resources and abstraction availability : final report |
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| 459 | An environmental assessment of mercury in mussels (Mytilus edulis L.) in the Mersey Estuary : final report |
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| 460 | Heavy metal contaminants in fish caught from the Mersey Estuary and inshore Liverpool Bay |
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| 461 | Pesticides 2000 : a summary of monitoring of the aquatic environment in England and Wales |
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| 462 | An investigation of the Madford River pollution incident of 29 July 1989 : November 1989 |
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| 463 | Devon area internal report - measurement of dissolved oxygen levels in the Dart estuary - March 1996 |
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| 464 | Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales |
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| 465 | The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria |
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| 466 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 467 | Analysis of bacteriological contamination and accumulation of metals and organics in the mussel (Mytilus edulis) |
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| 468 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 469 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2012 |
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| 470 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk C in 2011 |
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| 471 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2013 |
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| 472 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2012 |
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| 473 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk C in 2013 |
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| 474 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk A in 2011 |
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| 475 | A review of the hydrogeological information for the Thompson and Merton areas, Norfolk : including predictions of the impact of nearby chalk water abstractions on water levels at Thompson Water, Carr and Common SSSI and candidate SAC |
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