| 526 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 1 : final draft |
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| 527 | An investigation into the frequency of discharge of three combined sewer overflows in the Afan/Kenfig catchment : TM/EAW/96/06 |
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| 528 | NRA report of the blue-green algal monitoring 1990 : a report by the toxic blue-green algae task group |
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| 529 | 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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| 530 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 531 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
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| 532 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 533 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 534 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 535 | The regulation of salmon angling in Great Britain
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| 536 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 537 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 538 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 539 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 540 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 541 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 542 | PVC : an evaluation using the Natural Step framework |
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| 543 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 544 | Landfill and the water environment : NRA position statement |
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| 545 | The vision for our environment : making it happen |
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| 546 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 547 | Quality audit of biological samples for the 1991 river quality survey |
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| 548 | The precious resource : a brief guide to managing our water resources |
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| 549 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 550 | Priority and other specific polluting substances and the Water Framework Directive |
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