| 326 | Ponds in Partnership Phase 1 Final Report: Establishing the Framework for the National Pond Monitoring Network |
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| 327 | SERPLAN development scenarios : the potential impact upon water resources in the SERPLAN region |
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| 328 | Towards the sustainable use of material resources : an evaluation using the natural step framework |
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| 329 | Water resources for the future : a summary of the strategy for Wales (bilingual) |
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| 330 | Water resources for the future : a summary of the strategy for North West Region |
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| 331 | Water resources for the future : a summary of the strategy for South West region |
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| 332 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
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| 333 | Review of flood defence practices on the Somerset Levels and Moors : the appendices |
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| 334 | Review of flood defence practices on the Somerset Levels and Moors : the report |
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| 335 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 336 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
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| 337 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 338 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
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| 339 | The influence of agriculture on the quality of natural waters in England and Wales |
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| 340 | The physical character of rivers and streams in the UK and Isle of Man |
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| 341 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 342 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 343 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
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| 344 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
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| 345 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 346 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
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| 347 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
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| 348 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 349 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
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| 350 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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