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626Low-cost modifications of the Crump weir to improve fish passage
627Policy and practice for the protection of groundwater - Thames region appendix
628Policy and practice for the protection of floodplains
629'Sea Vigil' water quality monitoring : the Wash 1992-1993
630Second annual review of the Seaton, Looe and Fowey catchment management plan
631The Yarrow catchment : recommendations for statutory water quality objectives
632Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
633The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
634Guidance on the use of Bioassays in Ecological Risk Assessment
635The National Rivers Authority employee attitude survey : summary
636The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
637Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
638Pesticides in the aquatic environment 1997 : executive summary
639Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
640Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
641The Louth coastal catchment management plan : final report
642Fine sediment deposition in the River Keer : geomorphological assessment
643Snapshots of the environment : a new environmental approach
644Draft protocol for the derivation of Toxicity Based Consents
645Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
646Second Coniston OS map related to the Seismic Survey 1983
647Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
648Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
649Coniston OS map related to the Seismic Survey 1983
650The flood of February 1990 : technical services flood monitoring report