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