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