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451The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)
452The Use of Immuno Based Techniques for Chemical Analysis
453Water from the River Dee : a working partnership
454Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
455River quality in England and Wales : a report of the 1990 survey
456Snapshots of the environment : understanding coastal water quality
457The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
458The evaluation of ingold ion selective ammonium electrode (220/23/T)
459Stratification in the Severn Estuary- Physical aspects and biological consequences
460The Mersey estuary : a report on environmental quality
461Catches of migratory fish in the River Don, Aberdeenshire
462Stream survey and assessment in the Ashford and Folkestone areas
463Lakes, Ponds and Reservoirs in the Southern Region (NRA)
464The 1990 river and estuary classification survey of England and Wales
465The evaluation of an orion ammonium ion selective electrode (220/15/T)
466An Independent Review of the Defra/EA Research and Development Joint
467Anthropogenic Impacts on the Hydrology of Rivers and Lochs
468Dissemination of the Revitalised FEH Rainfall-runoff Method
469General guide to the prevention of water pollution
470Guidance on the use of Soil Screening Values for Ecological Risk Assessment
471Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
472Life cycle assessment of disposable and reusable nappies in the UK
473Managing the social aspects of flooding: Synthesis Report
474National guidelines for the production of NRA regions 1990/91 regional plans
475Operational mechanisms for the protection and enhancement of headwaters