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451Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995
452Tributyltin in the aquatic environment : final report to the National Rivers Authority September 1990 to September 1992
453A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids
454An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000
455Report on Grayling research and production in the Anglian region of the National Rivers Authority, December 1988 to April 1989
456The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997
457Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996
458Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993
459Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region
460Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996
461A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids
462River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team
463Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual)
464Implementation of environmental accounting : the way ahead for a new "green agency" : submitted for the Open University Open Business School MBA
465Regulation guidance and direction making powers in the Environment Act 1995 in relation to the Environment Agency
466Opportunities for change : the Environment Agency's response to the government consultation paper on a revised UK strategy for sustainable development
467An Assessment of Cormorant Depredation on Stillwater Coarse Fish Populations in the Lea and Colne Valleys of the Thames Catchment
468Water framework directive : guiding principles on the technical requirements (summary) : accompanying summary to the Environment Agency consultation document
469A biological investigation of the affects of discharges from Meldon quarry on the West Okemont River - 8/08/89 and 20/09/89
470An investigation to determine if Great Torrington STW is the cause of elevated copper and zinc concentrations in the River Torridge
471Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example
472A preliminary investigation into the extent of saline ingress into Curry Moor from the River Tone, January 1994
473Bioccumulation of halogenated compounds by limpets and fucoid seaweeds in the vicinity by the Black Rock sewage outfall, Weston-Super-Mare
474Modelling the contribution from non-agricultural sources to nitrate pollution in the Sor Brook (Thames Region) (UC 3134)
475Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank