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576Contribution of small streams to potential fish production in the Conwy catchment
577The ecology and management of riverine trees : interim report
578Low-cost modifications of the Crump weir to improve fish passage
579Policy and practice for the protection of groundwater - Thames region appendix
580Policy and practice for the protection of floodplains
581'Sea Vigil' water quality monitoring : the Wash 1992-1993
582The Yarrow catchment : recommendations for statutory water quality objectives
583Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
584The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
585Guidance on the use of Bioassays in Ecological Risk Assessment
586The National Rivers Authority employee attitude survey : summary
587The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
588Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
589Pesticides in the aquatic environment 1997 : executive summary
590Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
591Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
592The Louth coastal catchment management plan : final report
593Snapshots of the environment : a new environmental approach
594Draft protocol for the derivation of Toxicity Based Consents
595Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
596Second Coniston OS map related to the Seismic Survey 1983
597Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
598Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
599Coniston OS map related to the Seismic Survey 1983
600Sustainable drainage systems (SuDS) : an evaluation using the Natural Step framework