| 401 | Habitat preferences of the bullhead (Cottus gobio) in some Norfolk rivers |
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| 402 | Improving the environment in Midlands region : Midlands local contribution 2006/11 |
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| 403 | England's river : a guide to the Thames from Remenham to Cookham |
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| 404 | Regulation of dioxin releases from the Runcorn operations of ICI and EVC |
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| 405 | Partnership in environmental protection : schemes in the Midlands Region 1995 - 1996 |
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| 406 | An investigation into the incidence of spurting from weeping wall slurry stores |
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| 407 | NRA superannuation report and accounts for the period ended 31 March 1991 |
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| 408 | Further guidance on the environmental assessment of projects |
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| 409 | Assessing the impact of dewatering on water resources |
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| 410 | The use and design of oil separators in surface water drainage systems |
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| 411 | The utilisation of stick-pile otter holts in south east Wales |
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| 412 | Improving the Environment Agency's contribution to wetland bird populations |
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| 413 | Improving the contribution of social science to Flood Risk Management |
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| 414 | The River Tywi catchment management plan : action plan (bilingual) |
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| 415 | Reappraisal of the River Lee to Wheathampstead Mill |
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| 416 | Business requirement specification : integrated accounting system for the (IAS) |
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| 417 | A report on fish production in the National Rivers Authority |
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| 418 | Moston Brook Summary Report for the Evidence and Measures Project |
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| 419 | User notes for the Deben groundwater modelling package |
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| 420 | London's river (information pack on the River Thames) |
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| 421 | Water and the environment in times of drought |
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| 422 | A strategy for the management of salmon in England and Wales |
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| 423 | Algae or sewage? : helping you tell the difference |
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| 424 | The Role Of Bankside Habitat In River Ecology |
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| 425 | Economic changes to the value of water environment : draft final report |
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