| 476 | The Economics of No-Spray Zones - a Study of the Risks and Benefits of Pesticide No-Spray Restrictions |
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| 477 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
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| 478 | Biological investigation of the impact of Ivybridge sewage treatment works discharge to the River Erme, May 1991 |
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| 479 | An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989 |
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| 480 | An investigation into high concentrations of atrazine in surface waters and the increase in maize production in the Otter valley |
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| 481 | River Habitat Quality the physical character of rivers and streams in the UK and Isle of Man |
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| 482 | Investigation of flow distribution in a fracture zone at the Stripa mine, using the radar method, results and interpretation |
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| 483 | Biosensors for environmental monitoring : a review of capabilities and strategies for the future : consultant's report to the NRA |
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| 484 | An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06 |
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| 485 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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| 486 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 487 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
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| 488 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 489 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 490 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 491 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 492 | The regulation of salmon angling in Great Britain
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| 493 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 494 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 495 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 496 | PVC : an evaluation using the Natural Step framework |
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| 497 | Landfill and the water environment : NRA position statement |
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| 498 | The vision for our environment : making it happen |
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| 499 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 500 | Pesticides in the aquatic environment 1997 full report |
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