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576The evaluation of ingold ion selective ammonium electrode (220/23/T)
577Rivers of the Isle of Wight fact file
578The Influence of Variations in Flow on General Quality Assessment of Rivers
579Stratification in the Severn Estuary- Physical aspects and biological consequences
580Stream survey and assessment in the Ashford and Folkestone areas
581Lakes, Ponds and Reservoirs in the Southern Region (NRA)
582The 1990 river and estuary classification survey of England and Wales
583The evaluation of an orion ammonium ion selective electrode (220/15/T)
584An Independent Review of the Defra/EA Research and Development Joint
585Anthropogenic Impacts on the Hydrology of Rivers and Lochs
586Dissemination of the Revitalised FEH Rainfall-runoff Method
587General guide to the prevention of water pollution
588Guidance for the Development of Housing on Land Affected by Contamination
589Guidance on the use of Soil Screening Values for Ecological Risk Assessment
590Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
591Life cycle assessment of disposable and reusable nappies in the UK
592Managing the social aspects of flooding: Synthesis Report
593Model For Investigating The Impacts Of Groundwater Abstraction
594National guidelines for the production of NRA regions 1990/91 regional plans
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