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676First annual review of the Taw/Torridge estuary catchment management plan (1996)
677Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy
678Method for the assessment of river water quality using benthic macroinvertebrates
679Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
680The National Groundwater and Contaminated Land Centre (NGWCLC)
681The evaluation of a Philips ammonium ion selective electrode (220/14/T)
682The greening of Grasmere: its plankton periodicity in 1988
683A strategic review of the petroleum refinery Industry Sector
684Guidelines for river corridor surveys in the NRA : February 1992. draft 3
685Contribution of small streams to potential fish production in the Conwy catchment
686NRA strategy for reducing the concentration of pesticides in controlled waters
687The ecology and management of riverine trees : interim report
688Low-cost modifications of the Crump weir to improve fish passage
689Policy and practice for the protection of floodplains
690'Sea Vigil' water quality monitoring : the Wash 1992-1993
691The Yarrow catchment : recommendations for statutory water quality objectives
692Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
693The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
694Guidance on the use of Bioassays in Ecological Risk Assessment
695The National Rivers Authority employee attitude survey : summary
696The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
697Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
698Pesticides in the aquatic environment 1997 : executive summary
699Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
700Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)