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426First annual review of the Taw/Torridge estuary catchment management plan (1996)
427Suffolk estuarine strategies : Blyth estuary strategy : introduction to the strategy
428Development of Operational and Policy Guidance on the Use of Hydrogen Peroxide
429The evaluation of a Philips ammonium ion selective electrode (220/14/T)
430A strategic review of the petroleum refinery Industry Sector
431Guidelines for river corridor surveys in the NRA : February 1992. draft 3
432Second annual review of the Sid/Otter catchment management plan 1999
433Contribution of small streams to potential fish production in the Conwy catchment
434NRA strategy for reducing the concentration of pesticides in controlled waters
435The ecology and management of riverine trees : interim report
436Low-cost modifications of the Crump weir to improve fish passage
437Policy and practice for the protection of floodplains
438Second annual review of the Seaton, Looe and Fowey catchment management plan
439Leachate Migration Through The Triassic Sandstones At Burntstump Landfill And Elsewhere
440The evaluation of a Nico Elit 051 ammonium ion selective electrode (220/16/T)
441Guidance on the use of Bioassays in Ecological Risk Assessment
442The National Rivers Authority employee attitude survey : summary
443The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
444Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
445Pesticides in the aquatic environment 1997 : executive summary
446Mercury and methylmercury in the river Yare, Norfolk (OI/420/8/A)
447Draft protocol for the derivation of Toxicity Based Consents
448Assessment of the Impact of Nutrient Removal on Eutrophic Rivers
449Second Coniston OS map related to the Seismic Survey 1983
450Note 2 by Professor Gerald Sargent regarding the Coniston Seismic Survey 1983