501 | The groundwater regulations (Bilingual) : Rheoliadau dwr daear (Bilingual) |
502 | The Use of Immuno Based Techniques for Chemical Analysis |
503 | Charging for discharges scheme : guidance to the power generation industry |
504 | Water from the River Dee : a working partnership |
505 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
506 | Development of an Estuarine Classification Scheme for the Water Framework Directive |
507 | Policy and practice for the protection of groundwater : draft for consultation |
508 | Snapshots of the environment : understanding coastal water quality |
509 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
510 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
511 | Water related recreation strategy for the southern region : consultation draft 1997 |
512 | Rivers of the Isle of Wight fact file |
513 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
514 | The Mersey estuary : a report on environmental quality |
515 | Stream survey and assessment in the Ashford and Folkestone areas |
516 | Alternative Methods For The Biological Classification Of Rivers |
517 | Toxic blue-green algae : a report by the National Rivers Authority |
518 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
519 | Results of the NRA Welsh regional marine bioaccumulation programme 1991-1993 : SE/EAU/94/8 |
520 | The 1990 river and estuary classification survey of England and Wales |
521 | Dioxins and the River Doe Lea : plain English report |
522 | Water quality in Anglian Region : the first five years |
523 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
524 | The quality of rivers and estuaries in Northumbria region 1990 |
525 | General awareness, environment management and the Water Framework Directive (WFD) |