| 551 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 552 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 553 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 554 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 555 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 556 | The regulation of salmon angling in Great Britain
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| 557 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 558 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 559 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 560 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 561 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 562 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 563 | PVC : an evaluation using the Natural Step framework |
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| 564 | Landfill and the water environment : NRA position statement |
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| 565 | The vision for our environment : making it happen |
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| 566 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 567 | Quality audit of biological samples for the 1991 river quality survey |
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| 568 | Pesticides in the aquatic environment 1997 full report |
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| 569 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
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| 570 | The precious resource : a brief guide to managing our water resources |
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| 571 | Charging for discharges scheme : guidance to the agricultural industry |
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| 572 | Priority and other specific polluting substances and the Water Framework Directive |
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| 573 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
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| 574 | Evaluation of historical data on the nutrient status of Esthwaite Water, Cumbria
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| 575 | An Aerial Photograph of Ferry House and The Pearsall Building |
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