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526Quality audit of biological samples for the 1991 river quality survey
527Pesticides in the aquatic environment 1997 full report
528The precious resource : a brief guide to managing our water resources
529Quantification of the relationship between effluent quality and biological quality : final report
530Priority and other specific polluting substances and the Water Framework Directive
531'Sea Vigil' water quality monitoring : the Humber estuary 1994
532Evaluation of historical data on the nutrient status of Esthwaite Water, Cumbria
533An Aerial Photograph of Ferry House and The Pearsall Building
534Review of existing practices for fluvial grass management throughout the NRA (213/1/Y)
535Research and development in the Environment Agency : a short guide
536Clear Options towards an operational model for the Lee Valley Reservoirs
537The Cam catchment : recommendations for statutory water quality objectives
538Guidance for estimating the air quality impact of stationary sources - GN 24
539Introductory guidance on the Agency's contribution to sustainable development (SD1)
540The National Centre for Toxic and Persistent Substances
541Pearl Mussel Image: First out of the blocks
542FWR - User guide for assessing the impact of combined sewer overflows
543The National Centre for Environmental Data and Surveillance : general leaflet
544Project management and the scheme of delegation : a summary guide : April 1995
545The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)
546The Use of Immuno Based Techniques for Chemical Analysis
547Water from the River Dee : a working partnership
548Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
549The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
550The evaluation of ingold ion selective ammonium electrode (220/23/T)