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676The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
677Guidance on the use of Bioassays in Ecological Risk Assessment
678The National Rivers Authority employee attitude survey : summary
679The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
680Pesticides in the aquatic environment 1997 : executive summary
681Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
682Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
683The Louth coastal catchment management plan : final report
684Fine sediment deposition in the River Keer : geomorphological assessment
685Snapshots of the environment : a new environmental approach
686Draft protocol for the derivation of Toxicity Based Consents
687The Loddon catchment, Thames : recommendations for statutory water quality objectives
688Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
689Second Coniston OS map related to the Seismic Survey 1983
690Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
691Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
692Coniston OS map related to the Seismic Survey 1983
693The flood of February 1990 : technical services flood monitoring report
694Sustainable drainage systems (SuDS) : an evaluation using the Natural Step framework
695Uses of the water environment: factsheet number six
696River basin planning and the Water Framework Directive
697First annual review of the Taw/Torridge estuary catchment management plan (1996)
698Flood alleviation proposals for Bakewell and Ashford in the Water
699An update on the Hexham flood alleviation scheme, Autumn 2006
700(Bilingual) Assessing the impact of dewatering on water resources