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651Guidelines for river corridor surveys in the NRA : February 1992. draft 3
652Contribution of small streams to potential fish production in the Conwy catchment
653NRA strategy for reducing the concentration of pesticides in controlled waters
654The ecology and management of riverine trees : interim report
655Low-cost modifications of the Crump weir to improve fish passage
656Policy and practice for the protection of groundwater - Thames region appendix
657Policy and practice for the protection of floodplains
658'Sea Vigil' water quality monitoring : the Wash 1992-1993
659Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
660The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
661Guidance on the use of Bioassays in Ecological Risk Assessment
662The National Rivers Authority employee attitude survey : summary
663The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
664Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
665Pesticides in the aquatic environment 1997 : executive summary
666Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
667Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
668The Louth coastal catchment management plan : final report
669Fine sediment deposition in the River Keer : geomorphological assessment
670Snapshots of the environment : a new environmental approach
671Draft protocol for the derivation of Toxicity Based Consents
672The Loddon catchment, Thames : recommendations for statutory water quality objectives
673Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
674Second Coniston OS map related to the Seismic Survey 1983
675Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983