| 501 | General guide to the prevention of water pollution |
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| 502 | Guidance on the use of Soil Screening Values for Ecological Risk Assessment |
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| 503 | Highway runoff: Effects of soluble pollutants on the ecology of receiving waters |
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| 504 | Life cycle assessment of disposable and reusable nappies in the UK |
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| 505 | Managing the social aspects of flooding: Synthesis Report |
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| 506 | National guidelines for the production of NRA regions 1990/91 regional plans |
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| 507 | Operational mechanisms for the protection and enhancement of headwaters |
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| 508 | Procurement legislation and the NRA : a brief guide |
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| 509 | Survey of copper speciation in the Great Ouse estuary |
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| 510 | Sustainable development indicators : monitoring change in the East Midlands |
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| 511 | Technical Support Materials for the Regulation of Radioactively Contaminated Land |
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| 512 | The impact of climate change on severe droughts: Implications for decision making |
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| 513 | The Impact of Grazing and Upland Management on Erosion and Runoff |
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| 514 | The Potential For Generating Hydro-Electricity From Weirs |
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| 515 | The Potential For Aquifer Storage And Recovery In England And Wales |
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| 516 | Water resources for the future : a strategy for Midlands Region |
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| 517 | Water resources for the future : a strategy for Southern region |
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| 518 | The feasibility of biomanipulation in reservoirs and deeper lakes : draft final report |
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| 519 | River Great Ouse navigation : the Great Ouse your river for life |
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| 520 | The Feasibility of Charging for Planning Application Consultations - Final Report |
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| 521 | The use of herbicides in or near water |
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| 522 | Status of rare fish : literature review of Freshwater Fish in the UK |
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| 523 | Distribution of Azolla in the Great Ouse catchment |
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| 524 | Investigation into the cause of high phenols in Budleigh Brook (1998) |
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| 525 | Leachate Monitoring For The Brogborough Test Cell Project |
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