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676A strategic review of the petroleum refinery Industry Sector
677Guidelines for river corridor surveys in the NRA : February 1992. draft 3
678Contribution of small streams to potential fish production in the Conwy catchment
679NRA strategy for reducing the concentration of pesticides in controlled waters
680The ecology and management of riverine trees : interim report
681Low-cost modifications of the Crump weir to improve fish passage
682Policy and practice for the protection of floodplains
683'Sea Vigil' water quality monitoring : the Wash 1992-1993
684Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
685The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
686Guidance on the use of Bioassays in Ecological Risk Assessment
687The National Rivers Authority employee attitude survey : summary
688The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
689Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
690Pesticides in the aquatic environment 1997 : executive summary
691Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
692Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
693Fine sediment deposition in the River Keer : geomorphological assessment
694Draft protocol for the derivation of Toxicity Based Consents
695Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
696Second Coniston OS map related to the Seismic Survey 1983
697Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
698Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
699Coniston OS map related to the Seismic Survey 1983
700The flood of February 1990 : technical services flood monitoring report