| 551 | The regulation of salmon angling in Great Britain
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| 552 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 553 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 554 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 555 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 556 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 557 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 558 | PVC : an evaluation using the Natural Step framework |
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| 559 | Recommendations For The Processing And Presentation Of Groundwater Quality Data |
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| 560 | Landfill and the water environment : NRA position statement |
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| 561 | The vision for our environment : making it happen |
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| 562 | Environment Agency guidance on the conditioning of intermediate level waste |
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| 563 | Quality audit of biological samples for the 1991 river quality survey |
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| 564 | Pesticides in the aquatic environment 1997 full report |
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| 565 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
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| 566 | The precious resource : a brief guide to managing our water resources |
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| 567 | Quantification of the relationship between effluent quality and biological quality : final report |
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| 568 | Charging for discharges scheme : guidance to the agricultural industry |
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| 569 | Priority and other specific polluting substances and the Water Framework Directive |
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| 570 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
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| 571 | Evaluation of historical data on the nutrient status of Esthwaite Water, Cumbria
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| 572 | An Aerial Photograph of Ferry House and The Pearsall Building |
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| 573 | Review of existing practices for fluvial grass management throughout the NRA (213/1/Y) |
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| 574 | The interpretation of rod and net catch data |
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| 575 | Research and development in the Environment Agency : a short guide |
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