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701Method for the assessment of river water quality using benthic macroinvertebrates
702Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
703The National Groundwater and Contaminated Land Centre (NGWCLC)
704The evaluation of a Philips ammonium ion selective electrode (220/14/T)
705The greening of Grasmere: its plankton periodicity in 1988
706A strategic review of the petroleum refinery Industry Sector
707Guidelines for river corridor surveys in the NRA : February 1992. draft 3
708Contribution of small streams to potential fish production in the Conwy catchment
709NRA strategy for reducing the concentration of pesticides in controlled waters
710The ecology and management of riverine trees : interim report
711Low-cost modifications of the Crump weir to improve fish passage
712Policy and practice for the protection of groundwater - Thames region appendix
713Policy and practice for the protection of floodplains
714'Sea Vigil' water quality monitoring : the Wash 1992-1993
715The Yarrow catchment : recommendations for statutory water quality objectives
716Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
717The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
718Guidance on the use of Bioassays in Ecological Risk Assessment
719The National Rivers Authority employee attitude survey : summary
720The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
721Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
722Pesticides in the aquatic environment 1997 : executive summary
723Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
724Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
725Fine sediment deposition in the River Keer : geomorphological assessment