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651A strategic review of the petroleum refinery Industry Sector
652Guidelines for river corridor surveys in the NRA : February 1992. draft 3
653Second annual review of the Sid/Otter catchment management plan 1999
654NRA strategy for reducing the concentration of pesticides in controlled waters
655Low-cost modifications of the Crump weir to improve fish passage
656Policy and practice for the protection of groundwater - Thames region appendix
657Policy and practice for the protection of floodplains
658'Sea Vigil' water quality monitoring : the Wash 1992-1993
659The Yarrow catchment : recommendations for statutory water quality objectives
660Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
661The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
662Guidance on the use of Bioassays in Ecological Risk Assessment
663The National Rivers Authority employee attitude survey : summary
664The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
665Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
666Pesticides in the aquatic environment 1997 : executive summary
667Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
668Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
669The Louth coastal catchment management plan : final report
670Fine sediment deposition in the River Keer : geomorphological assessment
671Snapshots of the environment : a new environmental approach
672Draft protocol for the derivation of Toxicity Based Consents
673The Loddon catchment, Thames : recommendations for statutory water quality objectives
674Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
675Second Coniston OS map related to the Seismic Survey 1983