| 576 | Ecotoxicology : a report of the NRA R and D Ecotoxicology Group |
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| 577 | General awareness, environment management and the Water Framework Directive (WFD) |
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| 578 | Guardians of the water environment (NRA Thames Region) |
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| 579 | Further Validation of PHABSIM for the Habitat Requirements of Salmonid Fish |
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| 580 | A second stage evaluation of the Grant YSI3815 Water Logger |
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| 581 | Audit report on the 1995 GQA biological survey |
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| 582 | A report on the use of pesticides at two Hampshire watercress farms |
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| 583 | Fact sheet for the RBCA tool kit for chemical releases |
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| 584 | Some guidance on the use of digital environmental data |
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| 585 | Assessing and controlling the ecotoxicity of complex effluents |
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| 586 | Charging for discharges scheme : guidance to the power generation industry |
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| 587 | An assessment of river water quality in the River Kenn |
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| 588 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 589 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 590 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
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| 591 | Narrowboats on the Thames : useful hints and tips |
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| 592 | Locks and weirs on the river Thames : how do they work? |
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| 593 | Fishery survey of the Bridgwater and Taunton Canal |
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| 594 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 595 | A guide to sustainable urban drainage : protecting the quality of our environment |
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| 596 | Air dispersion climate from the Castle Cement works at Ribblesdale |
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| 597 | A Review Of The Impact Of Microbiological Contaminants In Groundwater |
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| 598 | The NRA in business : annual review and summary accounts 1993-94 |
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| 599 | Environmental statement for the River Wandle flood alleviation scheme contract one (C1) |
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| 600 | Cyanobacteria (blue-green algae) in the south west region 1989 |
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