| 526 | The River Babingley. Volume 1 : executive summary : a report for National Rivers Authority, Anglian Region |
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| 527 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 528 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
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| 529 | Demand for irrigation water (413/1/A) : progress report for the period August 1992 to January 1993 |
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| 530 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 531 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk D |
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| 532 | Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments |
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| 533 | Hope Cove : non-compliance in 1998 with the European Community bathing water directive (76/160/EEC) |
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| 534 | The hydrological effects of demand management : project definition stage report : 28th May 1996 |
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| 535 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 536 | NRA programme for the monitoring of water quality Parts 1 to 3 - November 1994 |
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| 537 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
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| 538 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 539 | Environment Agency Kent area : the Seabrook stream : BSc (Hons) Environmental biology placement report |
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| 540 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 541 | Groundwater management in the North West: efficiency review and business plan: certificate in management |
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| 542 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 543 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 544 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 545 | Manual for the use of herbicides in or near water : January 1993 : final draft report |
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| 546 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 547 | The Environment Agency water efficiency awards 2003 : inspirational case studies demonstrating good practice across all sectors |
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| 548 | An investigation of the Madford River pollution incident of 29 July 1989 : November 1989 |
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| 549 | Report on the By Brook low flow investigations : October 2001 : volume 1 : report |
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| 550 | Linking hydrology and ecology : River Wissey : Annex B aquatic macrophytes of the River Wissey |
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