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576The Influence of Variations in Flow on General Quality Assessment of Rivers
577Stratification in the Severn Estuary- Physical aspects and biological consequences
578The Mersey estuary : a report on environmental quality
579'Sea Vigil' water quality monitoring : the East coast 1992-1993
580Catches of migratory fish in the River Don, Aberdeenshire
581The 1990 river and estuary classification survey of England and Wales
582The evaluation of an orion ammonium ion selective electrode (220/15/T)
583An Independent Review of the Defra/EA Research and Development Joint
584Anthropogenic Impacts on the Hydrology of Rivers and Lochs
585Dissemination of the Revitalised FEH Rainfall-runoff Method
586General guide to the prevention of water pollution
587Guidance for the Development of Housing on Land Affected by Contamination
588Guidance on the use of Soil Screening Values for Ecological Risk Assessment
589Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
590Life cycle assessment of disposable and reusable nappies in the UK
591Managing the social aspects of flooding: Synthesis Report
592Model For Investigating The Impacts Of Groundwater Abstraction
593National guidelines for the production of NRA regions 1990/91 regional plans
594Operational mechanisms for the protection and enhancement of headwaters
595Policy and practice for the protection of groundwater : regional appendix Welsh region
596Procurement legislation and the NRA : a brief guide
597Strategic review of development and flood risk : the River Welland catchment
598Strategic review of development and flood risk : the River Witham catchment
599Survey of copper speciation in the Great Ouse estuary
600Sustainable development indicators : monitoring change in the East Midlands