| 526 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 527 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 528 | Environmental snapshot for the East of England [version 1] |
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| 529 | The regulation of salmon angling in Great Britain
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| 530 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 531 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 532 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 533 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 534 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 535 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 536 | PVC : an evaluation using the Natural Step framework |
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| 537 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 538 | Landfill and the water environment : NRA position statement |
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| 539 | The vision for our environment : making it happen |
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| 540 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 541 | Quality audit of biological samples for the 1991 river quality survey |
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| 542 | Pesticides in the aquatic environment 1997 full report |
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| 543 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
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| 544 | The precious resource : a brief guide to managing our water resources |
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| 545 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 546 | Charging for discharges scheme : guidance to the agricultural industry |
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| 547 | Priority and other specific polluting substances and the Water Framework Directive |
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| 548 | Evaluation of historical data on the nutrient status of Esthwaite Water, Cumbria
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| 549 | An Aerial Photograph of Ferry House and The Pearsall Building |
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| 550 | Review of existing practices for fluvial grass management throughout the NRA (213/1/Y) |
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