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676The greening of Grasmere: its plankton periodicity in 1988
677A strategic review of the petroleum refinery Industry Sector
678Guidelines for river corridor surveys in the NRA : February 1992. draft 3
679Contribution of small streams to potential fish production in the Conwy catchment
680NRA strategy for reducing the concentration of pesticides in controlled waters
681The ecology and management of riverine trees : interim report
682Low-cost modifications of the Crump weir to improve fish passage
683Policy and practice for the protection of groundwater - Thames region appendix
684Policy and practice for the protection of floodplains
685'Sea Vigil' water quality monitoring : the Wash 1992-1993
686Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
687The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
688Guidance on the use of Bioassays in Ecological Risk Assessment
689The National Rivers Authority employee attitude survey : summary
690The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
691Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
692Pesticides in the aquatic environment 1997 : executive summary
693Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
694Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
695Fine sediment deposition in the River Keer : geomorphological assessment
696Snapshots of the environment : a new environmental approach
697Draft protocol for the derivation of Toxicity Based Consents
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