| 401 | Review of flood defence practices on the Somerset Levels and Moors : the report |
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| 402 | Estuarine fish survey 1989 : inferences on the pollution status of the Thames estuary |
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| 403 | Investigation of the water quality in the Buckland stream up and downstream of East/West Buckland |
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| 404 | Planning for the rising tides : the Humber estuary shoreline management plan. Summary of proposals |
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| 405 | Further surveys to elucidate the distribution of the fine-lined pea mussel Pisidium tenuilineatum Stelfox, 1918 |
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| 406 | The physical character of rivers and streams in the UK and Isle of Man |
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| 407 | The Distribution of Phytoplankton and Nutrients in the North East Irish Sea During 1998 |
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| 408 | Biological assessment of the effects of Ivybridge Sewage Treatment Works on the River Erme |
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| 409 | The impact of industrial discharges on metal levels in biota of the West Cumbrian coast - 1990 |
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| 410 | Environmental monitoring of the Fal Estuary to support the Fal Swan study : final draft report |
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| 411 | The impact of land use on salmonids (Report 30) : a study of the River Torridge catchment |
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| 412 | The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation |
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| 413 | A unified information system to satisfy the NRA's requirement for ecotoxicology information: the specification study |
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| 414 | A Status Report on the Direct Oxygenation of the Tywi Estuary - October 1989 |
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| 415 | A collation of the environmental impact work carried out following the Rosebay oil spill, May 1990 |
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| 416 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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| 417 | An investigation into the effects of Alton sewage works on the River Wey North |
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| 418 | Investigation into the impact of Henstridge sewage treatment works on the River Umber, North Devon |
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| 419 | A brief history of the River Stour navigation : 1705 to the present day |
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| 420 | The Investigation and Specification of Flow Measurement Structure Design Features that Aid the Migration of Fish |
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| 421 | Protecting your future : tackling flooding in the Thames Estuary through the 21st century |
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| 422 | The land-use planning system and the Water Framework Directive (can't read barcode) |
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| 423 | The Natural (Baseline) Quality Of Groundwaters In England And Wales - The Culm Aquifers, SW England; |
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| 424 | Rural sewage pollution in the '90s : report of the rural sewerage project 1993/4 |
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| 425 | Report for Anglian Water, NRA Unit on the uses of the Orwell and the Stour Estuaries and the use of the mathematical model to derive long term consent limits for all inputs to Orwell Estuary |
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