| 501 | Options for transfer of water from the River Trent and reservoir storage at Great Bradley : technical summary of the feasibility report |
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| 502 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 503 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 504 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 505 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 506 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 507 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 508 | Environmental snapshot for the East of England [version 1] |
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| 509 | The regulation of salmon angling in Great Britain
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| 510 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 511 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 512 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 513 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 514 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 515 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 516 | PVC : an evaluation using the Natural Step framework |
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| 517 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 518 | Landfill and the water environment : NRA position statement |
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| 519 | The vision for our environment : making it happen |
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| 520 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 521 | Pesticides in the aquatic environment 1997 full report |
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| 522 | The precious resource : a brief guide to managing our water resources |
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| 523 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 524 | Charging for discharges scheme : guidance to the agricultural industry |
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| 525 | Priority and other specific polluting substances and the Water Framework Directive |
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