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551The evaluation of ingold ion selective ammonium electrode (220/23/T)
552The Influence of Variations in Flow on General Quality Assessment of Rivers
553Stratification in the Severn Estuary- Physical aspects and biological consequences
554The Mersey estuary : a report on environmental quality
555'Sea Vigil' water quality monitoring : the East coast 1992-1993
556Catches of migratory fish in the River Don, Aberdeenshire
557Stream survey and assessment in the Ashford and Folkestone areas
558The 1990 river and estuary classification survey of England and Wales
559The evaluation of an orion ammonium ion selective electrode (220/15/T)
560An Independent Review of the Defra/EA Research and Development Joint
561Anthropogenic Impacts on the Hydrology of Rivers and Lochs
562Dissemination of the Revitalised FEH Rainfall-runoff Method
563General guide to the prevention of water pollution
564Guidance for the Development of Housing on Land Affected by Contamination
565Guidance on the use of Soil Screening Values for Ecological Risk Assessment
566Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
567Life cycle assessment of disposable and reusable nappies in the UK
568Managing the social aspects of flooding: Synthesis Report
569Model For Investigating The Impacts Of Groundwater Abstraction
570National guidelines for the production of NRA regions 1990/91 regional plans
571Operational mechanisms for the protection and enhancement of headwaters
572Policy and practice for the protection of groundwater : regional appendix Welsh region
573Procurement legislation and the NRA : a brief guide
574Strategic review of development and flood risk : the River Welland catchment
575Strategic review of development and flood risk : the River Witham catchment