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401Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000
402An investigation into the water quality of a treated effluent from Hambleton Dairy, Todber, Dorset
403Chemical river quality 1993-1995 according to the general quality assessment (GQA) scheme [map] : scale 1 : 750 000
404The development of macroinvertebrate keys using TWINSPAN classification : a manual for NRA biologists (001/10/W) : draft final report
405Audit of priority species of rivers and wetlands : kingfisher Alcedo atthis in South Hampshire and the Isle of Wight
406Addendum to the Stanmoor bank feasibility study and appraisal report : Lower Tone flood defence improvements : phase II
407An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake
408Audit of priority species of rivers and wetlands : Bittern Botaurus stellaris in South Hampshire and the Isle of Wight
409River Lemon corridor survey : a report prepared by Ecologue for the National Rivers Authority (South West Region)
410Audit of priority species of rivers and wetlands : white-clawed crayfish Austropotambius pallipes in South Hampshire and the Isle of Wight
411Graphical representation of certain metals and organics concentrations versus flow rates for some of the rivers in Districts 3 and 6
412The Blythe/Cole/Bourne catchment management plan : first annual review : July 1994 to July 1995 (NRA Severn-Trent 48)
413Eutrophication in controlled waters in the Warwickshire Avon catchment (final report). Vol 1 : report and executive summary
414Analysis of natural and polluted river communities in Great Britain- Progress report for the period January-December 1987
415Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales
416Audit of priority species of rivers and wetlands : riverine and wetland molluscs in South Hampshire and the Isle of Wight
417River Glen : river channel assessment : annex B : an analysis of invertebrate records for the River Glen 1976-1991
418Torridge data report : biological monitoring of organic inputs to the study catchments using rapid biological assessment keys
419An audit of performance in the analysis of biological samples in 2000. Environment Agency : primary audit : C00158/10
420River Stour (2), Sudbury : report of a river corridor survey carried out for the National Rivers Authority, Anglian region
421An audit of performance in the analysis of biological samples in 2000. Environment Agency : AQC audit : C00158/11
422Mercury and methylmercury in the river Yare, Norfolk (1986 - 1992) (OI/420/8/A annex) : annex to main report
423Low flows and water resources : facts on the top 40 low flow rivers in England and Wales
424The Warwickshire Avon catchment management plan : first annual review : October 1994 - October 1995 (NRA Severn -Trent 45)
425Endocrine Modulating Effects of Wastewater Treatment Works Effluents: 'Sensitive Windows' for inducing germ-cell intersex in the Roach (Rutilus rutilus)