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526A study to investigate and propose remedies for river quality problems in the Madford catchment
527Broadland flood alleviation strategy : the programme for flood defence works
528Severn Trent region : River Sence, Hilton Brook : Annex of R and D Note 456
529Water quality 2000 : a strategy for the water quality function
530R and D project management manual : user manual
531Pollution and how to spot it (NRA Severn-Trent 61)
532River corridor strategic overview feasibility study : a report to the National Rivers Authority
533An assessment of River Fowey salmonid populations
534An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000
535Water quality report 1990
536The Role of Bankside Habitat in River Ecology: The importance of riparian and marginal vegetation on the distribution and abundance of aquatice invertebrates
537Identified uses of tidal waters : volume 1
538River Tavy catchment river water quality classification 1991
539St Columb Major STW UV disinfection survey 1994 : final draft report
540Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report
541The role of the National Rivers Authority in droughts
542River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire
543River quality : 1993
544Fishery survey of the River Axe catchment
545Synoptic State of the Environment Monitoring
546Monitoring of rivers and effluents
547Impact assessment of Meldon quarry on water quality in the West Okement river
548River Strat catchment river water quality classification 1991
549River catchment management plans : data report
550Hampshire salmon investigation report on salmon radio tracking 1991