| 4301 | River Wissey investigations : linking hydrology and ecology : the basis for in-river flow management. Final Draft (OI/526/ ) |
|---|
| 4302 | NRA superannuation report and accounts for the period ended 31 March 1991 |
|---|
| 4303 | Sewage treatment works remedial strategy : internal report |
|---|
| 4304 | Water resources development strategy : strategy overview. Supplementary report no. 9 |
|---|
| 4305 | River Gannel catchment river water quality classification 1991 |
|---|
| 4306 | Further guidance on the environmental assessment of projects |
|---|
| 4307 | Assessing the impact of sewage effluent disposal on groundwater (phase 2): final report |
|---|
| 4308 | Valuing Water Use in Scotland and Northern Ireland for WFD Implementation Purposes |
|---|
| 4309 | Contracts Department (National Rivers Authority) |
|---|
| 4310 | Determination of Metal Background Reference Concentrations: Feasibility Study |
|---|
| 4311 | The NRA severn-thames transfer project: an assessment of the effect of mixing of source waters on the chemical composition |
|---|
| 4312 | An assessment of cormorant depredation on stillwater coarse fish populations in the Lea and Colne valleys of the Thames catchment |
|---|
| 4313 | Taw/Torridge Estuary catchment management plan : consultation report : August 1993 |
|---|
| 4314 | Waterways Breeding Bird Survey Pilot Study 1998: Adaptation of BBS Census Methods to Rivers and Canals |
|---|
| 4315 | The Lowermoor environment report |
|---|
| 4316 | Where to fish on the River Wye and its tributaries : a guide to day ticket facilities |
|---|
| 4317 | River Irwell catchment management plan : water quality supplement |
|---|
| 4318 | Switch mechanisms between alternative stable states in freshwater communities (01/574/1/A) |
|---|
| 4319 | River habitats in England and Wales : a national overview : river habitat survey report no 1 |
|---|
| 4320 | Effects of Canoeing on Fish Stocks and Angling |
|---|
| 4321 | Bathing water quality in England and Wales in 1993 : report of the National Rivers Authority |
|---|
| 4322 | The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Chalk Of Lincolnshire; |
|---|
| 4323 | A Review of Grayling Ecology, Status and Management Practice Recommendations for Future Managemetn in England and Wales |
|---|
| 4324 | Guidelines on statutory returns : Freshwater Fish Directive |
|---|
| 4325 | Teddington flow survey 1989 |
|---|
