| 526 | Water and the environment in times of drought |
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| 527 | Water and the environment in times of drought |
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| 528 | A strategy for the management of salmon in England and Wales |
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| 529 | Algae or sewage? : helping you tell the difference |
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| 530 | Economic changes to the value of water environment : draft final report |
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| 531 | NRA superannuation report and accounts for the period ended 31 March 1990 |
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| 532 | Wash zone report. Part 1 : the Wash NRA monitoring review |
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| 533 | The Cam catchment, Anglian region : proposals for statutory water quality objectives |
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| 534 | Computer files used in the calculation of Rutland and Grafham yields |
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| 535 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
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| 536 | The Restoration of Floodplain Woodlands in Lowland Britain |
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| 537 | Take to the water : a beginner's guide to boating on inland waterways |
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| 538 | Report on the quality of bathing waters 1990 |
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| 539 | Wetlands for Wales : a strategy for the third millenium |
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| 540 | Protecting and improving the water environment : model policies |
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| 541 | The Impacts of flooding on urban and rural communities |
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| 542 | The relationship between turbidity and suspended solids in final effluents |
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| 543 | General guide to the prevention of pollution of controlled water |
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| 544 | The Environmental Impact of Fish Farming - A Review |
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| 545 | The evaluation of an hydrolab DS3 submersible water quality monitor |
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| 546 | Sustaining our resources : the way forward : summary document |
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| 547 | The Removal of Technetium from EARP Waste Streams, Phase II |
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| 548 | Benchmarking rainfall runoff models within the Anglian Region : final report |
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| 549 | Cross border river basin districts and the Water Framework Directive |
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| 550 | The Occurrence of Sheep Dip Pesticides in Environmental Waters June 1997 |
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