376 | Conservation and recreation: the Wye challenge: volume 1: report of the River Wye project |
377 | A strategy for implementing the Environment Agency's contribution to the UK Biodiversity Action Plan |
378 | SERPLAN development scenarios : the potential impact upon water resources in the SERPLAN region |
379 | Towards the sustainable use of material resources : an evaluation using the natural step framework |
380 | Water resources for the future : a summary of the strategy for Wales (bilingual) |
381 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
382 | Running with the tide : reconciling development pressures with flood risk and the environment |
383 | Water for the future in Kent : NRA response to the issues and options report |
384 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
385 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
386 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
387 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
388 | The influence of agriculture on the quality of natural waters in England and Wales |
389 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
390 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
391 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
392 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
393 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
394 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
395 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
396 | An investigation into the effects of Alton sewage works on the River Wey North |
397 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
398 | A brief history of the River Stour navigation : 1705 to the present day |
399 | The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish |
400 | Discharges of waste under the EC titanium dioxide directives : report of the National Rivers Authority |