| 426 | SERPLAN development scenarios : the potential impact upon water resources in the SERPLAN region |
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| 427 | Towards the sustainable use of material resources : an evaluation using the natural step framework |
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| 428 | Water resources for the future : a summary of the strategy for Wales (bilingual) |
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| 429 | Water resources for the future : a summary of the strategy for North West Region |
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| 430 | Water resources for the future : a summary of the strategy for South West region |
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| 431 | Classification of listed substances for the purposes of the EC groundwater directive (80/68/EEC) : technical report |
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| 432 | Running with the tide : reconciling development pressures with flood risk and the environment |
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| 433 | Water for the future in Kent : NRA response to the issues and options report |
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| 434 | Review of flood defence practices on the Somerset Levels and Moors : the report |
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| 435 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 436 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
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| 437 | The Effect of Atrazine Exposure on the Timing of Salmon (Salmo salar L.) Smolt Emigration |
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| 438 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
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| 439 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
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| 440 | The physical character of rivers and streams in the UK and Isle of Man |
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| 441 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 442 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 443 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
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| 444 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
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| 445 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 446 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
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| 447 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
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| 448 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 449 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
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| 450 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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