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651The Influence of Variations in Flow on General Quality Assessment of Rivers
652Stratification in the Severn Estuary- Physical aspects and biological consequences
653The Mersey estuary : a report on environmental quality
654Catches of migratory fish in the River Don, Aberdeenshire
655Stream survey and assessment in the Ashford and Folkestone areas
656Lakes, Ponds and Reservoirs in the Southern Region (NRA)
657The 1990 river and estuary classification survey of England and Wales
658The evaluation of an orion ammonium ion selective electrode (220/15/T)
659An Independent Review of the Defra/EA Research and Development Joint
660Anthropogenic Impacts on the Hydrology of Rivers and Lochs
661Dissemination of the Revitalised FEH Rainfall-runoff Method
662General guide to the prevention of water pollution
663Guidance for the Development of Housing on Land Affected by Contamination
664Guidance on the use of Soil Screening Values for Ecological Risk Assessment
665Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
666Life cycle assessment of disposable and reusable nappies in the UK
667Managing the social aspects of flooding: Synthesis Report
668Model For Investigating The Impacts Of Groundwater Abstraction
669National guidelines for the production of NRA regions 1990/91 regional plans
670Operational mechanisms for the protection and enhancement of headwaters
671Policy and practice for the protection of groundwater : regional appendix Welsh region
672Procurement legislation and the NRA : a brief guide
673Strategic review of development and flood risk : the River Welland catchment
674Strategic review of development and flood risk : the River Witham catchment
675Survey of copper speciation in the Great Ouse estuary