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676A strategic review of the petroleum refinery Industry Sector
677Second annual review of the Sid/Otter catchment management plan 1999
678Contribution of small streams to potential fish production in the Conwy catchment
679NRA strategy for reducing the concentration of pesticides in controlled waters
680The ecology and management of riverine trees : interim report
681Low-cost modifications of the Crump weir to improve fish passage
682Policy and practice for the protection of groundwater - Thames region appendix
683Policy and practice for the protection of floodplains
684Second annual review of the Seaton, Looe and Fowey catchment management plan
685The Yarrow catchment : recommendations for statutory water quality objectives
686Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
687The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
688Guidance on the use of Bioassays in Ecological Risk Assessment
689The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
690Pesticides in the aquatic environment 1997 : executive summary
691Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
692Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
693The Louth coastal catchment management plan : final report
694Fine sediment deposition in the River Keer : geomorphological assessment
695Snapshots of the environment : a new environmental approach
696Draft protocol for the derivation of Toxicity Based Consents
697The Loddon catchment, Thames : recommendations for statutory water quality objectives
698Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
699The flood of February 1990 : technical services flood monitoring report
700Sustainable drainage systems (SuDS) : an evaluation using the Natural Step framework