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