| 551 | Economic evaluation of inland fisheries: The economic impact of freshwater angling in England and Wales |
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| 552 | Demand for irrigation water (413/1/A) : progress report for the period August 1992 to January 1993 |
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| 553 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 554 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk D |
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| 555 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk M |
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| 556 | Annual review of the Colne, Upper Lee, North London and Roding, Beam and Ingerbourne catchments |
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| 557 | The hydrological effects of demand management : project definition stage report : 28th May 1996 |
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| 558 | Biological river quality 1995 according to the general quality (GQA) scheme [map] : scale 1 : 750 000 |
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| 559 | NRA programme for the monitoring of water quality Parts 1 to 3 - November 1994 |
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| 560 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 561 | Catchment management plans : protecting and enhancing the water environment in an integrated manner |
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| 562 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 563 | Environment Agency Kent area : the Seabrook stream : BSc (Hons) Environmental biology placement report |
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| 564 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 565 | Groundwater management in the North West: efficiency review and business plan: certificate in management |
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| 566 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 567 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 568 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 569 | Manual for the use of herbicides in or near water : January 1993 : final draft report |
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| 570 | Impact assessment of Meldon quarry on water quality in the West Okement river |
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| 571 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 572 | The Environment Agency water efficiency awards 2003 : inspirational case studies demonstrating good practice across all sectors |
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| 573 | An investigation of the Madford River pollution incident of 29 July 1989 : November 1989 |
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| 574 | Report on the By Brook low flow investigations : October 2001 : volume 1 : report |
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| 575 | A report on water quality issues within the Midford Brook catchment - June 1996 |
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