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626Guidance on the use of Bioassays in Ecological Risk Assessment
627The National Rivers Authority employee attitude survey : summary
628The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
629Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
630Pesticides in the aquatic environment 1997 : executive summary
631Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
632Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
633Fine sediment deposition in the River Keer : geomorphological assessment
634Draft protocol for the derivation of Toxicity Based Consents
635Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
636Second Coniston OS map related to the Seismic Survey 1983
637Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
638Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
639Coniston OS map related to the Seismic Survey 1983
640The flood of February 1990 : technical services flood monitoring report
641Sustainable drainage systems (SuDS) : an evaluation using the Natural Step framework
642Flood alleviation proposals for Bakewell and Ashford in the Water
643An update on the Hexham flood alleviation scheme, Autumn 2006
644(Bilingual) Assessing the impact of dewatering on water resources
645Catches of Brown Trout in the River Don
646Environmental snapshot for the East of England [2000]
647Biological water quality monitoring in the Midlands region
648A natural assets register for the Sankey catchment. Volume 2
649Clinical waste management in the community : a guide to managing waste
650Non-compliance with water quality objectives on the Croyde stream (upper catchment)