| 551 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 552 | Environment Agency Kent area : the Seabrook stream : BSc (Hons) Environmental biology placement report |
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| 553 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 554 | Groundwater management in the North West: efficiency review and business plan: certificate in management |
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| 555 | Water pollution incidents in England and Wales - 1993 : report of the National Rivers Authority |
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| 556 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 557 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 558 | Manual for the use of herbicides in or near water : January 1993 : final draft report |
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| 559 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 560 | The Environment Agency water efficiency awards 2003 : inspirational case studies demonstrating good practice across all sectors |
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| 561 | An investigation of the Madford River pollution incident of 29 July 1989 : November 1989 |
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| 562 | Report on the By Brook low flow investigations : October 2001 : volume 1 : report |
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| 563 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk F |
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| 564 | Future water resources in the Thames Region : a strategy for sustainable management. June 1994 |
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| 565 | The Warwickshire Avon catchment management plan : consultation report summary (NRA Severn-Trent 44) |
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| 566 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk A |
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| 567 | The development of a portable battery-powered telemetry system for use in water quality investigations |
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| 568 | Proceedings of the conference National Minewaters 20th -21st April 1998 Tapton Hall Sheffield University |
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| 569 | The Influence of Variations in Flow on General Quality Assessment of Rivers - Summary Document |
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| 570 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 571 | Impact assessment of Meldon quarry on water quality in the West Okement river |
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| 572 | River Meavy salmon and sea trout populations : assessment of the impact of flows |
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| 573 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk C |
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| 574 | The effect of ferric dosing of lakes on benthic invertebrates : first year report |
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| 575 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk D |
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