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451Introductory guidance on the Agency's contribution to sustainable development (SD1)
452The National Centre for Toxic and Persistent Substances
453Acidification of freshwaters: the threat and its mitigation
454Pearl Mussel Image: First out of the blocks
455FWR - User guide for assessing the impact of combined sewer overflows
456The National Centre for Environmental Data and Surveillance : general leaflet
457Project management and the scheme of delegation : a summary guide : April 1995
458The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)
459The Use of Immuno Based Techniques for Chemical Analysis
460Snapshots of the environment : integrated river basin management
461Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
462River quality in England and Wales : a report of the 1990 survey
463Snapshots of the environment : understanding coastal water quality
464The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
465The evaluation of ingold ion selective ammonium electrode (220/23/T)
466The Influence of Variations in Flow on General Quality Assessment of Rivers
467Stratification in the Severn Estuary- Physical aspects and biological consequences
468'Sea Vigil' water quality monitoring : the East coast 1992-1993
469Catches of migratory fish in the River Don, Aberdeenshire
470Stream survey and assessment in the Ashford and Folkestone areas
471The 1990 river and estuary classification survey of England and Wales
472The evaluation of an orion ammonium ion selective electrode (220/15/T)
473An Independent Review of the Defra/EA Research and Development Joint
474Anthropogenic Impacts on the Hydrology of Rivers and Lochs
475Dissemination of the Revitalised FEH Rainfall-runoff Method