1 | The effects of flow reduction in the River Dee on the aquatic environment |
2 | The impact of ferruginous minewater break-outs on the environmental quality of the Rivers Rhymney, Ebbw and Sirhowy : summary report |
3 | Achieving the quality (Bilingual) : Sicrhau Ansawdd (Bilingual) |
4 | Investigations into the status of fisheries, biological and water quality in the River Pelenna catchment, prior to the treatment of discharges from abandoned coal mines : PL/EAW/95/3 |
5 | The quality of rivers in England and Wales (1990 to 1995) |
6 | The NRA in business : annual review and summary accounts 1993-94 |
7 | River quality in England and Wales : a report of the 1990 survey |
8 | River corridor strategic overview feasibility study : a report to the National Rivers Authority |
9 | Freshwater migration of sea trout (Salmo trutta L.) in the river Tywi during 1988, 1989 and 1990 |
10 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |