476 | The interpretation of rod and net catch data |
477 | Research and development in the Environment Agency : a short guide |
478 | Problems with sea trout and salmon in the Western Highlands |
479 | Clear Options towards an operational model for the Lee Valley Reservoirs |
480 | Guidance for estimating the air quality impact of stationary sources - GN 24 |
481 | Introductory guidance on the Agency's contribution to sustainable development (SD1) |
482 | The National Centre for Toxic and Persistent Substances |
483 | Algal blooms in the Lower Tees- Perspectives and prospects
|
484 | Acidification of freshwaters: the threat and its mitigation |
485 | Pearl Mussel Image: First out of the blocks |
486 | FWR - User guide for assessing the impact of combined sewer overflows |
487 | The National Centre for Environmental Data and Surveillance : general leaflet |
488 | Project management and the scheme of delegation : a summary guide : April 1995 |
489 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
490 | The Use of Immuno Based Techniques for Chemical Analysis |
491 | Snapshots of the environment : integrated river basin management |
492 | Water from the River Dee : a working partnership |
493 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
494 | River quality in England and Wales : a report of the 1990 survey |
495 | Snapshots of the environment : understanding coastal water quality |
496 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
497 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
498 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
499 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
500 | The Mersey estuary : a report on environmental quality |