| 451 | The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997 |
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| 452 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996 |
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| 453 | Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993 |
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| 454 | Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994 |
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| 455 | Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare |
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| 456 | An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989 |
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| 457 | Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region |
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| 458 | Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank |
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| 459 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 460 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 461 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 462 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 463 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 464 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 465 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 466 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 467 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 468 | An Investigation of Ecological Change in the Rivers Kennet and Lambourn |
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| 469 | PVC : an evaluation using the Natural Step framework |
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| 470 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
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| 471 | The Rivers Test and Itchen : salmon management plan : a consultation document |
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| 472 | Investigations of discharges into the River Lemon at Newton Abbot |
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| 473 | Pesticides in the aquatic environment 1997 full report |
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| 474 | Policy and practice for the protection of groundwater - NRA leaflet |
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| 475 | The fuel additive MTBE - a groundwater protection issue? |
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