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476Clear Options towards an operational model for the Lee Valley Reservoirs
477Guidance for estimating the air quality impact of stationary sources - GN 24
478Introductory guidance on the Agency's contribution to sustainable development (SD1)
479The National Centre for Toxic and Persistent Substances
480Acidification of freshwaters: the threat and its mitigation
481Pearl Mussel Image: First out of the blocks
482The National Centre for Environmental Data and Surveillance : general leaflet
483Project management and the scheme of delegation : a summary guide : April 1995
484The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual)
485The Use of Immuno Based Techniques for Chemical Analysis
486Snapshots of the environment : integrated river basin management
487Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991
488River quality in England and Wales : a report of the 1990 survey
489Snapshots of the environment : understanding coastal water quality
490The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T)
491The evaluation of ingold ion selective ammonium electrode (220/23/T)
492The Influence of Variations in Flow on General Quality Assessment of Rivers
493Stratification in the Severn Estuary- Physical aspects and biological consequences
494'Sea Vigil' water quality monitoring : the East coast 1992-1993
495Catches of migratory fish in the River Don, Aberdeenshire
496Stream survey and assessment in the Ashford and Folkestone areas
497Lakes, Ponds and Reservoirs in the Southern Region (NRA)
498The 1990 river and estuary classification survey of England and Wales
499The evaluation of an orion ammonium ion selective electrode (220/15/T)
500An Independent Review of the Defra/EA Research and Development Joint