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551Low-cost modifications of the Crump weir to improve fish passage
552Policy and practice for the protection of floodplains
553The Yarrow catchment : recommendations for statutory water quality objectives
554Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
555The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
556Guidance on the use of Bioassays in Ecological Risk Assessment
557The National Rivers Authority employee attitude survey : summary
558The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
559Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
560Pesticides in the aquatic environment 1997 : executive summary
561Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
562Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
563Draft protocol for the derivation of Toxicity Based Consents
564The Loddon catchment, Thames : recommendations for statutory water quality objectives
565Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
566Second Coniston OS map related to the Seismic Survey 1983
567Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
568Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
569Coniston OS map related to the Seismic Survey 1983
570Policy and practice for the protection of groundwater : Southern region appendix
571(Bilingual) Assessing the impact of dewatering on water resources
572Biological water quality monitoring in the Midlands region
573A natural assets register for the Sankey catchment. Volume 2
574Non-compliance with water quality objectives on the Croyde stream (upper catchment)
575Bacteriological monitoring of freshwater rivers in the Thames Region 1995