351 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
352 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : primary audit |
353 | The regulation of fish farming by the National Rivers Authority |
354 | Sewage treatment works remedial strategy : phase 2 report |
355 | Bathing water quality in England and Wales 1999 : a summary report |
356 | Bathing water quality in England and Wales in 1997 : a summary report |
357 | Bathing water quality in England and Wales in 1998 : a summary report |
358 | Microalgal monitoring in coastal waters 1993-1995 |
359 | Salmonid genetics in water : report of an Interim Review Meeting, St. Mellons, 17/4/91 |
360 | Groundwater protection zones : methodology and definition of protection zones (Bilingual) : Parthau gwarchod dwr daear : methodoleg a difiniad o'r parthau gwarchod |
361 | River Dee water protection zone : a consultation document |
362 | Taff catchment management plan : consultation report : April 1995 |
363 | River Rhymney wildlife habitat improvements |
364 | Conwy catchment management plan : water quality assessment technical memorandum |
365 | Dee catchment management plan : biological assessment of agricultural catchments |
366 | Digital groundwater vulnerability maps : 1 : 100,000 series. Policy and practice for the protection of groundwater |
367 | Framework for national groundwater quality reporting technical report |
368 | NRA fisheries strategy |
369 | NRA recreation strategy |
370 | The Dee regulation scheme (bilingual) |
371 | FRONTIERS evaluation of radar-based rainfall and river flow forecasts April 1992 to March 1993 |
372 | Database and atlas of aquatic vascular plants : phase 2 (352/1/N) : interim report |
373 | Afan and Kenfig catchment management plan : consultation report |
374 | Anglesey catchment management plan : consultation report 1996: (bilingual) |
375 | Anglesey catchment management plan : consultation report summary |