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526NRA strategy for reducing the concentration of pesticides in controlled waters
527Low-cost modifications of the Crump weir to improve fish passage
528Policy and practice for the protection of floodplains
529'Sea Vigil' water quality monitoring : the Wash 1992-1993
530Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
531The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
532The National Rivers Authority employee attitude survey : summary
533The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
534Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
535Pesticides in the aquatic environment 1997 : executive summary
536The Louth coastal catchment management plan : final report
537Snapshots of the environment : a new environmental approach
538Draft protocol for the derivation of Toxicity Based Consents
539Second Coniston OS map related to the Seismic Survey 1983
540Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
541Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
542Coniston OS map related to the Seismic Survey 1983
543The flood of February 1990 : technical services flood monitoring report
544Sustainable drainage systems (SuDS) : an evaluation using the Natural Step framework
545Policy and practice for the protection of groundwater : Southern region appendix
546Uses of the water environment: factsheet number six
547River basin planning and the Water Framework Directive
548An update on the Hexham flood alleviation scheme, Autumn 2006
549(Bilingual) Assessing the impact of dewatering on water resources
550Catches of Brown Trout in the River Don