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451Problems with sea trout and salmon in the Western Highlands
452Clear Options towards an operational model for the Lee Valley Reservoirs
453Guidance for estimating the air quality impact of stationary sources - GN 24
454Introductory guidance on the Agency's contribution to sustainable development (SD1)
455The National Centre for Toxic and Persistent Substances
456Acidification of freshwaters: the threat and its mitigation
457Pearl Mussel Image: First out of the blocks
458FWR - User guide for assessing the impact of combined sewer overflows
459The National Centre for Environmental Data and Surveillance : general leaflet
460Project management and the scheme of delegation : a summary guide : April 1995
461The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)
462The Use of Immuno Based Techniques for Chemical Analysis
463Snapshots of the environment : integrated river basin management
464Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
465River quality in England and Wales : a report of the 1990 survey
466Snapshots of the environment : understanding coastal water quality
467The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
468The evaluation of ingold ion selective ammonium electrode (220/23/T)
469The Influence of Variations in Flow on General Quality Assessment of Rivers
470Stratification in the Severn Estuary- Physical aspects and biological consequences
471Catches of migratory fish in the River Don, Aberdeenshire
472Stream survey and assessment in the Ashford and Folkestone areas
473Lakes, Ponds and Reservoirs in the Southern Region (NRA)
474The evaluation of an orion ammonium ion selective electrode (220/15/T)
475An Independent Review of the Defra/EA Research and Development Joint