| 626 | Corporate Environmental Reporting in the UK Water Sector - A Concise Review |
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| 627 | Strategy for the use of field instrumentation in water quality monitoring |
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| 628 | Anthropogenic Influences on the temperature regime in a chalk river |
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| 629 | London's river (information pack on the River Thames) |
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| 630 | Water and the environment in times of drought |
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| 631 | Water and the environment in times of drought |
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| 632 | A strategy for the management of salmon in England and Wales |
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| 633 | Algae or sewage? : helping you tell the difference |
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| 634 | The Role Of Bankside Habitat In River Ecology |
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| 635 | Economic changes to the value of water environment : draft final report |
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| 636 | NRA superannuation report and accounts for the period ended 31 March 1990 |
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| 637 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 638 | Broadland flood alleviation strategy : the programme for flood defence works |
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| 639 | Water quality 2000 : a strategy for the water quality function |
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| 640 | Computer files used in the calculation of Rutland and Grafham yields |
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| 641 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 642 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 643 | Take to the water : a beginner's guide to boating on inland waterways |
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| 644 | Report on the quality of bathing waters 1990 |
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| 645 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
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| 646 | Wetlands for Wales : a strategy for the third millenium |
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| 647 | Protecting and improving the water environment : model policies |
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| 648 | The Impacts of flooding on urban and rural communities |
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| 649 | The relationship between turbidity and suspended solids in final effluents |
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| 650 | General guide to the prevention of pollution of controlled water |
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