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526Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995
527Tributyltin in the aquatic environment : final report to the National Rivers Authority September 1990 to September 1992
528A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids
529An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000
530Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season
531Guidance notes for local planning authorities on the methods of protecting the water environment through development plans
532Report on Grayling research and production in the Anglian region of the National Rivers Authority, December 1988 to April 1989
533The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads
534The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997
535Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996
536Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993
537Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD
538Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994
539Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996
540Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996
541A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids
542River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team
543Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
544An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment
545Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
546A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
547An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96
548An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95]
549An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
550Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example