| 476 | User notes for the Deben groundwater modelling package |
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| 477 | Anthropogenic Influences on the temperature regime in a chalk river |
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| 478 | Water and the environment in times of drought |
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| 479 | Water and the environment in times of drought |
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| 480 | A strategy for the management of salmon in England and Wales |
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| 481 | Algae or sewage? : helping you tell the difference |
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| 482 | Economic changes to the value of water environment : draft final report |
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| 483 | NRA superannuation report and accounts for the period ended 31 March 1990 |
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| 484 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 485 | The Cam catchment, Anglian region : proposals for statutory water quality objectives |
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| 486 | Computer files used in the calculation of Rutland and Grafham yields |
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| 487 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 488 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 489 | Take to the water : a beginner's guide to boating on inland waterways |
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| 490 | Report on the quality of bathing waters 1990 |
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| 491 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
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| 492 | Wetlands for Wales : a strategy for the third millenium |
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| 493 | Protecting and improving the water environment : model policies |
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| 494 | The Impacts of flooding on urban and rural communities |
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| 495 | The relationship between turbidity and suspended solids in final effluents |
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| 496 | General guide to the prevention of pollution of controlled water |
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| 497 | The Environmental Impact of Fish Farming - A Review |
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| 498 | The evaluation of an hydrolab DS3 submersible water quality monitor |
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| 499 | Sustaining our resources : the way forward : summary document |
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| 500 | The Removal of Technetium from EARP Waste Streams, Phase II |
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