401 | Towards the sustainable use of material resources : an evaluation using the natural step framework |
402 | Water resources for the future : a summary of the strategy for Wales (bilingual) |
403 | Water resources for the future : a summary of the strategy for North West Region |
404 | Water resources for the future : a summary of the strategy for South West region |
405 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
406 | Running with the tide : reconciling development pressures with flood risk and the environment |
407 | Water for the future in Kent : NRA response to the issues and options report |
408 | Review of flood defence practices on the Somerset Levels and Moors : the appendices |
409 | Review of flood defence practices on the Somerset Levels and Moors : the report |
410 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
411 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
412 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
413 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
414 | The influence of agriculture on the quality of natural waters in England and Wales |
415 | The physical character of rivers and streams in the UK and Isle of Man |
416 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
417 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
418 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
419 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
420 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
421 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
422 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
423 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
424 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
425 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |