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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
684The Yarrow catchment : recommendations for statutory water quality objectives
685Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
686The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
687Guidance on the use of Bioassays in Ecological Risk Assessment
688The National Rivers Authority employee attitude survey : summary
689The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
690Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
691Pesticides in the aquatic environment 1997 : executive summary
692Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
693Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
694Fine sediment deposition in the River Keer : geomorphological assessment
695Draft protocol for the derivation of Toxicity Based Consents
696The Loddon catchment, Thames : recommendations for statutory water quality objectives
697Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
698Second Coniston OS map related to the Seismic Survey 1983
699Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
700Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983