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676Contribution of small streams to potential fish production in the Conwy catchment
677NRA strategy for reducing the concentration of pesticides in controlled waters
678The ecology and management of riverine trees : interim report
679Low-cost modifications of the Crump weir to improve fish passage
680Policy and practice for the protection of groundwater - Thames region appendix
681Policy and practice for the protection of floodplains
682'Sea Vigil' water quality monitoring : the Wash 1992-1993
683Second annual review of the Seaton, Looe and Fowey catchment management plan
684The Yarrow catchment : recommendations for statutory water quality objectives
685Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
686The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
687The National Rivers Authority employee attitude survey : summary
688The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
689Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
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
699Second Coniston OS map related to the Seismic Survey 1983
700Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983