| 51 | 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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| 52 | Contaminants entering the sea : a report on contaminant loads entering the seas around England and Wales 1990-1993 |
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| 53 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 54 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 55 | Landfill and the water environment : NRA position statement |
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| 56 | Charging for discharges scheme : guidance to the agricultural industry |
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| 57 | Acidification of freshwaters: the threat and its mitigation |
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| 58 | Snapshots of the environment : integrated river basin management |
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| 59 | River quality in England and Wales : a report of the 1990 survey |
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| 60 | Snapshots of the environment : understanding coastal water quality |
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| 61 | Stream survey and assessment in the Ashford and Folkestone areas |
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| 62 | The 1990 river and estuary classification survey of England and Wales |
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| 63 | River Axe Fish Study - Evaluation of Fish Movements in the Estuary |
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| 64 | Sustainable urban drainage : an introduction : protecting the quality of our environment |
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| 65 | Snapshots of the environment : managing our freshwater fisheries |
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| 66 | The National Groundwater and Contaminated Land Centre (NGWCLC) |
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| 67 | The greening of Grasmere: its plankton periodicity in 1988 |
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| 68 | Policy and practice for the protection of floodplains |
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| 69 | Snapshots of the environment : a new environmental approach |
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| 70 | Second Coniston OS map related to the Seismic Survey 1983 |
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| 71 | Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983 |
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| 72 | Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983 |
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| 73 | Coniston OS map related to the Seismic Survey 1983 |
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| 74 | Biological water quality monitoring in the Midlands region |
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| 75 | Fish Guide 1997/98 A Guide to day ticket fisheries in the Midlands |
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