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576The National Rivers Authority employee attitude survey : summary
577The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
578Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
579Pesticides in the aquatic environment 1997 : executive summary
580Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
581Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
582Draft protocol for the derivation of Toxicity Based Consents
583The Loddon catchment, Thames : recommendations for statutory water quality objectives
584Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
585Second Coniston OS map related to the Seismic Survey 1983
586Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
587Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
588Coniston OS map related to the Seismic Survey 1983
589(Bilingual) Assessing the impact of dewatering on water resources
590Catches of Brown Trout in the River Don
591Biological water quality monitoring in the Midlands region
592A natural assets register for the Sankey catchment. Volume 2
593Non-compliance with water quality objectives on the Croyde stream (upper catchment)
594Bacteriological monitoring of freshwater rivers in the Thames Region 1995
595Impact of breakwaters on the water quality of Sidmouth beach
596Bass fishing in the Fal estuary and coastal area
597Report on the survey of SBM handlers in Devon
598Enhancing the environment : 25 case studies from Thames Region
599Fish Guide 1997/98 A Guide to day ticket fisheries in the Midlands
600Flood warning information for the river Witham and tributaries in Lincolnshire