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651Contribution of small streams to potential fish production in the Conwy catchment
652The ecology and management of riverine trees : interim report
653Low-cost modifications of the Crump weir to improve fish passage
654Policy and practice for the protection of groundwater - Thames region appendix
655Policy and practice for the protection of floodplains
656'Sea Vigil' water quality monitoring : the Wash 1992-1993
657Second annual review of the Seaton, Looe and Fowey catchment management plan
658The Yarrow catchment : recommendations for statutory water quality objectives
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
669Snapshots of the environment : a new environmental approach
670Draft protocol for the derivation of Toxicity Based Consents
671The Loddon catchment, Thames : recommendations for statutory water quality objectives
672Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
673Second Coniston OS map related to the Seismic Survey 1983
674Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983
675Note 1 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983