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476The Use of Immuno Based Techniques for Chemical Analysis
477Water from the River Dee : a working partnership
478River quality in England and Wales : a report of the 1990 survey
479Snapshots of the environment : understanding coastal water quality
480The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
481The evaluation of ingold ion selective ammonium electrode (220/23/T)
482Rivers of the Isle of Wight fact file
483Stratification in the Severn Estuary- Physical aspects and biological consequences
484'Sea Vigil' water quality monitoring : the East coast 1992-1993
485Lakes, Ponds and Reservoirs in the Southern Region (NRA)
486The 1990 river and estuary classification survey of England and Wales
487The evaluation of an orion ammonium ion selective electrode (220/15/T)
488Anthropogenic Impacts on the Hydrology of Rivers and Lochs
489General guide to the prevention of water pollution
490Guidance on the use of Soil Screening Values for Ecological Risk Assessment
491Highway runoff: Effects of soluble pollutants on the ecology of receiving waters
492Life cycle assessment of disposable and reusable nappies in the UK
493Managing the social aspects of flooding: Synthesis Report
494National guidelines for the production of NRA regions 1990/91 regional plans
495Operational mechanisms for the protection and enhancement of headwaters
496Policy and practice for the protection of groundwater : regional appendix Welsh region
497Procurement legislation and the NRA : a brief guide
498Survey of copper speciation in the Great Ouse estuary
499Sustainable development indicators : monitoring change in the East Midlands
500Technical Support Materials for the Regulation of Radioactively Contaminated Land