| 601 | Anthropogenic Influences on the temperature regime in a chalk river |
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| 602 | London's river (information pack on the River Thames) |
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| 603 | Water and the environment in times of drought |
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| 604 | Macroinvertebrates of the River Nar : Great Ouse catchment : draft report |
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| 605 | Water and the environment in times of drought |
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| 606 | Algae or sewage? : helping you tell the difference |
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| 607 | The Role Of Bankside Habitat In River Ecology |
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| 608 | Economic changes to the value of water environment : draft final report |
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| 609 | NRA superannuation report and accounts for the period ended 31 March 1990 |
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| 610 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 611 | Water quality 2000 : a strategy for the water quality function |
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| 612 | Computer files used in the calculation of Rutland and Grafham yields |
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| 613 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 614 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 615 | Take to the water : a beginner's guide to boating on inland waterways |
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| 616 | Report on the quality of bathing waters 1990 |
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| 617 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
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| 618 | Wetlands for Wales : a strategy for the third millenium |
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| 619 | The Impacts of flooding on urban and rural communities |
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| 620 | The relationship between turbidity and suspended solids in final effluents |
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| 621 | General guide to the prevention of pollution of controlled water |
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| 622 | The Environmental Impact of Fish Farming - A Review |
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| 623 | The evaluation of an hydrolab DS3 submersible water quality monitor |
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| 624 | The Removal of Technetium from EARP Waste Streams, Phase II |
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| 625 | Benchmarking rainfall runoff models within the Anglian Region : final report |
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