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576The National Groundwater and Contaminated Land Centre (NGWCLC)
577The evaluation of a Philips ammonium ion selective electrode (220/14/T)
578A strategic review of the petroleum refinery Industry Sector
579Guidelines for river corridor surveys in the NRA : February 1992. draft 3
580Second annual review of the Sid/Otter catchment management plan 1999
581Contribution of small streams to potential fish production in the Conwy catchment
582NRA strategy for reducing the concentration of pesticides in controlled waters
583The ecology and management of riverine trees : interim report
584Low-cost modifications of the Crump weir to improve fish passage
585Policy and practice for the protection of groundwater - Thames region appendix
586Policy and practice for the protection of floodplains
587Second annual review of the Seaton, Looe and Fowey catchment management plan
588Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
589The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
590Guidance on the use of Bioassays in Ecological Risk Assessment
591The National Rivers Authority employee attitude survey : summary
592The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
593Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
594Pesticides in the aquatic environment 1997 : executive summary
595Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
596Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
597Draft protocol for the derivation of Toxicity Based Consents
598Second Coniston OS map related to the Seismic Survey 1983
599Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
600Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983