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551The Use of Immuno Based Techniques for Chemical Analysis
552Snapshots of the environment : integrated river basin management
553Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
554River quality in England and Wales : a report of the 1990 survey
555Snapshots of the environment : understanding coastal water quality
556The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
557The evaluation of ingold ion selective ammonium electrode (220/23/T)
558Rivers of the Isle of Wight fact file
559The Influence of Variations in Flow on General Quality Assessment of Rivers
560Stratification in the Severn Estuary- Physical aspects and biological consequences
561'Sea Vigil' water quality monitoring : the East coast 1992-1993
562Catches of migratory fish in the River Don, Aberdeenshire
563Stream survey and assessment in the Ashford and Folkestone areas
564Lakes, Ponds and Reservoirs in the Southern Region (NRA)
565The 1990 river and estuary classification survey of England and Wales
566The evaluation of an orion ammonium ion selective electrode (220/15/T)
567An Independent Review of the Defra/EA Research and Development Joint
568Anthropogenic Impacts on the Hydrology of Rivers and Lochs
569Dissemination of the Revitalised FEH Rainfall-runoff Method
570General guide to the prevention of water pollution
571Guidance on the use of Soil Screening Values for Ecological Risk Assessment
572Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
573Life cycle assessment of disposable and reusable nappies in the UK
574Managing the social aspects of flooding: Synthesis Report
575National guidelines for the production of NRA regions 1990/91 regional plans