| 551 | Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993 |
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| 552 | Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD |
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| 553 | Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994 |
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| 554 | An investigation to determine the source of high levels of gamma-HCH in the Newlyn River during summer 1989 |
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| 555 | Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region |
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| 556 | Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996 |
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| 557 | Assessment of the Trophic Status of Rivers using Macrophytes - supporting documentation for evaluation of the Mean Trophic Rank |
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| 558 | Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996 |
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| 559 | Land use assessment of non-tidal main rivers in the southern region of the National Rivers Authority : report EX 2922 |
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| 560 | PhD Research. Gary Stephen Rushworth. The role of aquatic macroinvertebrates within reedswamps |
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| 561 | POLICY & PRACTICE FOR THE PROTECTION OF GROUNDWATER - DRAWINGS |
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| 562 | The River Eden Demonstration Test Catchment (DTC) Data |
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| 563 | 1967 - IBP Lake George, Uganda - starting to build the bedroom block |
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| 564 | Environmental snapshot for the East of England [version 1] |
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| 565 | The regulation of salmon angling in Great Britain
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| 566 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
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| 567 | The Evaluation of Acoustic Doppler Current Profiler Equipment |
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| 568 | Modelling phytoplankton development in the proposed Cardiff Bay Barrage
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| 569 | Dead zones, live markers: the biological environments of larger U.K. Rivers
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| 570 | Managing water abstraction : the catchment abstraction management strategy process : updated July 2002 |
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| 571 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
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| 572 | The evaluation of Grant/YSU 3800 water quality monitor |
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| 573 | An Investigation of Ecological Change in the Rivers Kennet and Lambourn |
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| 574 | State of the environment report for Thames Region : first update 2001 |
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| 575 | The Seaton, Looe and Fowey catchment management plan : action plan |
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