| 451 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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| 452 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 453 | 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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| 454 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 455 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 456 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 457 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 458 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 459 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 460 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 461 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 462 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 463 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 464 | PVC : an evaluation using the Natural Step framework |
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| 465 | Quality audit of biological samples for the 1991 river quality survey |
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| 466 | Pesticides in the aquatic environment 1997 full report |
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| 467 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 468 | Charging for discharges scheme : guidance to the agricultural industry |
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| 469 | Priority and other specific polluting substances and the Water Framework Directive |
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| 470 | Evaluation of historical data on the nutrient status of Esthwaite Water, Cumbria
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| 471 | An Aerial Photograph of Ferry House and The Pearsall Building |
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| 472 | Review of existing practices for fluvial grass management throughout the NRA (213/1/Y) |
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| 473 | Research and development in the Environment Agency : a short guide |
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| 474 | Clear Options towards an operational model for the Lee Valley Reservoirs |
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| 475 | The Cam catchment : recommendations for statutory water quality objectives |
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