551 | Anthropogenic Influences on the temperature regime in a chalk river |
552 | Water and the environment in times of drought |
553 | Water and the environment in times of drought |
554 | A strategy for the management of salmon in England and Wales |
555 | Algae or sewage? : helping you tell the difference |
556 | Economic changes to the value of water environment : draft final report |
557 | NRA superannuation report and accounts for the period ended 31 March 1990 |
558 | Wash zone report. Part 1 : the Wash NRA monitoring review |
559 | The Cam catchment, Anglian region : proposals for statutory water quality objectives |
560 | Computer files used in the calculation of Rutland and Grafham yields |
561 | The control of effluent discharges by a direct toxicity assessment (DTA) approach |
562 | The Restoration of Floodplain Woodlands in Lowland Britain |
563 | Take to the water : a beginner's guide to boating on inland waterways |
564 | Report on the quality of bathing waters 1990 |
565 | Guidance on the Assessment of Cause and Effect in Ecological Risk Assessment |
566 | Wetlands for Wales : a strategy for the third millenium |
567 | Protecting and improving the water environment : model policies |
568 | The Impacts of flooding on urban and rural communities |
569 | The relationship between turbidity and suspended solids in final effluents |
570 | General guide to the prevention of pollution of controlled water |
571 | The Environmental Impact of Fish Farming - A Review |
572 | The evaluation of an hydrolab DS3 submersible water quality monitor |
573 | Sustaining our resources : the way forward : summary document |
574 | The Removal of Technetium from EARP Waste Streams, Phase II |
575 | Benchmarking rainfall runoff models within the Anglian Region : final report |