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726Contribution of small streams to potential fish production in the Conwy catchment
727NRA strategy for reducing the concentration of pesticides in controlled waters
728The ecology and management of riverine trees : interim report
729Low-cost modifications of the Crump weir to improve fish passage
730Policy and practice for the protection of groundwater - Thames region appendix
731Policy and practice for the protection of floodplains
732'Sea Vigil' water quality monitoring : the Wash 1992-1993
733Second annual review of the Seaton, Looe and Fowey catchment management plan
734The Yarrow catchment : recommendations for statutory water quality objectives
735Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
736The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
737Guidance on the use of Bioassays in Ecological Risk Assessment
738The National Rivers Authority employee attitude survey : summary
739The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
740Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
741Pesticides in the aquatic environment 1997 : executive summary
742Targeted Monitoring Programme for Pharmaceuticals in the Aquatic Environment
743Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
744The Louth coastal catchment management plan : final report
745Fine sediment deposition in the River Keer : geomorphological assessment
746Snapshots of the environment : a new environmental approach
747Draft protocol for the derivation of Toxicity Based Consents
748The Loddon catchment, Thames : recommendations for statutory water quality objectives
749Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
750Second Coniston OS map related to the Seismic Survey 1983