| 451 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
|---|
| 452 | River quality in England and Wales : a report of the 1990 survey |
|---|
| 453 | Snapshots of the environment : understanding coastal water quality |
|---|
| 454 | The evaluation of EDT QSE 334 ammonium ion selective electrode (220/17/T) |
|---|
| 455 | The evaluation of ingold ion selective ammonium electrode (220/23/T) |
|---|
| 456 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
|---|
| 457 | Stratification in the Severn Estuary- Physical aspects and biological consequences |
|---|
| 458 | 'Sea Vigil' water quality monitoring : the East coast 1992-1993 |
|---|
| 459 | Catches of migratory fish in the River Don, Aberdeenshire |
|---|
| 460 | Stream survey and assessment in the Ashford and Folkestone areas |
|---|
| 461 | Lakes, Ponds and Reservoirs in the Southern Region (NRA) |
|---|
| 462 | The 1990 river and estuary classification survey of England and Wales |
|---|
| 463 | The evaluation of an orion ammonium ion selective electrode (220/15/T) |
|---|
| 464 | An Independent Review of the Defra/EA Research and Development Joint |
|---|
| 465 | Anthropogenic Impacts on the Hydrology of Rivers and Lochs |
|---|
| 466 | Dissemination of the Revitalised FEH Rainfall-runoff Method |
|---|
| 467 | General guide to the prevention of water pollution |
|---|
| 468 | Guidance for the Development of Housing on Land Affected by Contamination |
|---|
| 469 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
|---|
| 470 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
|---|
| 471 | Life cycle assessment of disposable and reusable nappies in the UK |
|---|
| 472 | Managing the social aspects of flooding: Synthesis Report |
|---|
| 473 | Model For Investigating The Impacts Of Groundwater Abstraction |
|---|
| 474 | National guidelines for the production of NRA regions 1990/91 regional plans |
|---|
| 475 | Operational mechanisms for the protection and enhancement of headwaters |
|---|
