| 426 | Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank |
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| 427 | An audit of performance in the AQC inspection of standard biological macro-invertebrate samples in 2002 : The Environment Agency (C00158/31) |
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| 428 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 429 | River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man |
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| 430 | Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation |
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| 431 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
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| 432 | Assessment of the feasibility of using image analysis in the oyster embryo-larval development and daphnia magna growth tests |
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| 433 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft |
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| 434 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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| 435 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 436 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 437 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 438 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 439 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 440 | Environmental snapshot for the East of England [version 1] |
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| 441 | The regulation of salmon angling in Great Britain
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| 442 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 443 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 444 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 445 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 446 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 447 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 448 | PVC : an evaluation using the Natural Step framework |
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| 449 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 450 | Landfill and the water environment : NRA position statement |
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