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551Quality audit of biological samples for the 1991 river quality survey
552Pesticides in the aquatic environment 1997 full report
553The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994
554The precious resource : a brief guide to managing our water resources
555Quantification of the relationship between effluent quality and biological quality : final report
556Charging for discharges scheme : guidance to the agricultural industry
557Priority and other specific polluting substances and the Water Framework Directive
558'Sea Vigil' water quality monitoring : the Humber estuary 1994
559An Aerial Photograph of Ferry House and The Pearsall Building
560Review of existing practices for fluvial grass management throughout the NRA (213/1/Y)
561The interpretation of rod and net catch data
562Problems with sea trout and salmon in the Western Highlands
563Clear Options towards an operational model for the Lee Valley Reservoirs
564The Cam catchment : recommendations for statutory water quality objectives
565The River Cam catchment management plan : annual monitoring report
566Guidance for estimating the air quality impact of stationary sources - GN 24
567The National Centre for Toxic and Persistent Substances
568Algal blooms in the Lower Tees- Perspectives and prospects
569Acidification of freshwaters: the threat and its mitigation
570Pearl Mussel Image: First out of the blocks
571Statement on public consultation for the Dove CMP : July 1995
572The Warwickshire Avon catchment management plan : final plan : October 1994
573FWR - User guide for assessing the impact of combined sewer overflows
574The National Centre for Environmental Data and Surveillance : general leaflet
575The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)