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401An investigation of the Madford River pollution incident of 29 July 1989 : November 1989
402Monitoring the effects of a combined sewer overflow discharge to a small watercourse in South Wales
403Time of travel study on the River Wandle under two different flow conditions
404Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000
405Lower Lee fish mortalities associated with rainfall : including the event of 7/8th September 1993
406Integrated river corridor assessment : a pilot study of the rivers Wansbeck and North Tyne in Northumbria
407River Teign corridor survey : prepared by Ecologue for the National Rivers Authority (South West Region)
408River Stort : draft catchment management plan for flood defence and the environment : May 1991
409Impact assessment of scour valve test at Roadford Reservoir on water quality of the River Lyd
410The Blythe/Cole/Bourne catchment management plan : first annual review : July 1994 to July 1995 (NRA Severn-Trent 48)
411Mercury and methylmercury in the river Yare, Norfolk (1986 - 1992) (OI/420/8/A annex) : annex to main report
412Audit of priority species of rivers and wetlands : riverine and wetland molluscs in South Hampshire and the Isle of Wight
413Audit of priority species of rivers and wetlands : kingfisher Alcedo atthis in South Hampshire and the Isle of Wight
414Audit of priority species of rivers and wetlands : Marsh Fritillary in South Hampshire and the Isle of Wight
415Audit of priority species of rivers and wetlands : Bittern Botaurus stellaris in South Hampshire and the Isle of Wight
416Audit of priority species of rivers and wetlands : white-clawed crayfish Austropotambius pallipes in South Hampshire and the Isle of Wight
417Investigation into failures of the River Dalch from Canns Mill Bridge to below Lapford sewage treatment works (2001)
418The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report
419River Stour (2), Sudbury : report of a river corridor survey carried out for the National Rivers Authority, Anglian region
420River Wissey investigations : linking hydrology and ecology : the basis for in-river flow management. Final Draft (OI/526/ )
421River Glen : river channel assessment : annex B : an analysis of invertebrate records for the River Glen 1976-1991
422River Glen : river channel assessment : annex C : an assessment of low flow characteristics of the River Glen, Lincolnshire
423The Warwickshire Avon catchment management plan : first annual review : October 1994 - October 1995 (NRA Severn -Trent 45)
424Analysis of natural and polluted river communities in Great Britain- Progress report for the period January-December 1987
425Low flows and water resources : facts on the top 40 low flow rivers in England and Wales