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601The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
602The evaluation of ingold ion selective ammonium electrode (220/23/T)
603Rivers of the Isle of Wight fact file
604The Influence of Variations in Flow on General Quality Assessment of Rivers
605Stratification in the Severn Estuary- Physical aspects and biological consequences
606The Mersey estuary : a report on environmental quality
607Catches of migratory fish in the River Don, Aberdeenshire
608Stream survey and assessment in the Ashford and Folkestone areas
609Lakes, Ponds and Reservoirs in the Southern Region (NRA)
610The 1990 river and estuary classification survey of England and Wales
611The evaluation of an orion ammonium ion selective electrode (220/15/T)
612An Independent Review of the Defra/EA Research and Development Joint
613Anthropogenic Impacts on the Hydrology of Rivers and Lochs
614Dissemination of the Revitalised FEH Rainfall-runoff Method
615General guide to the prevention of water pollution
616Guidance for the Development of Housing on Land Affected by Contamination
617Guidance on the use of Soil Screening Values for Ecological Risk Assessment
618Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
619Life cycle assessment of disposable and reusable nappies in the UK
620Managing the social aspects of flooding: Synthesis Report
621Model For Investigating The Impacts Of Groundwater Abstraction
622National guidelines for the production of NRA regions 1990/91 regional plans
623Operational mechanisms for the protection and enhancement of headwaters
624Policy and practice for the protection of groundwater : regional appendix Welsh region
625Procurement legislation and the NRA : a brief guide