| 801 | Water and the environment in times of drought |
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| 802 | Macroinvertebrates of the River Nar : Great Ouse catchment : draft report |
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| 803 | Water and the environment in times of drought |
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| 804 | A strategy for the management of salmon in England and Wales |
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| 805 | Algae or sewage? : helping you tell the difference |
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| 806 | The Role Of Bankside Habitat In River Ecology |
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| 807 | Economic changes to the value of water environment : draft final report |
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| 808 | NRA superannuation report and accounts for the period ended 31 March 1990 |
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| 809 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 810 | Broadland flood alleviation strategy : the programme for flood defence works |
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| 811 | Water quality 2000 : a strategy for the water quality function |
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| 812 | The Cam catchment, Anglian region : proposals for statutory water quality objectives |
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| 813 | Computer files used in the calculation of Rutland and Grafham yields |
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| 814 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 815 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 816 | Take to the water : a beginner's guide to boating on inland waterways |
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| 817 | Report on the quality of bathing waters 1990 |
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| 818 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
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| 819 | Wetlands for Wales : a strategy for the third millenium |
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| 820 | The Warwickshire Avon catchment management plan : consultation report : March 1994 |
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| 821 | Protecting and improving the water environment : model policies |
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| 822 | The Impacts of flooding on urban and rural communities |
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| 823 | The River Thame : catchment review : first draft - 16th Februrary 1996 |
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| 824 | The relationship between turbidity and suspended solids in final effluents |
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| 825 | General guide to the prevention of pollution of controlled water |
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