| 401 | The Worcestershire Stour catchment : recommendations for statutory water quality objectives |
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| 402 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 403 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 404 | Dioxins and the River Doe Lea : plain English report |
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| 405 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
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| 406 | Locks and weirs on the river Thames : how do they work? |
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| 407 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 408 | A guide to sustainable urban drainage : protecting the quality of our environment |
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| 409 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
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| 410 | Cyanobacteria (blue-green algae) in the south west region 1989 |
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| 411 | Toxic blue-green algae : a report by the National Rivers Authority |
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| 412 | Investigation of salinity in the river Thurne catchment of North East Norfolk |
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| 413 | Catchment abstraction management strategies (CAMS) and the Water Framework Directive (WFD) |
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| 414 | Managing water abstraction : the catchment abstraction management strategy process : April 2001 |
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| 415 | Water quality investigations in the Newlyn river catchment |
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| 416 | An assessment of water quality in the River Yarty catchment |
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| 417 | Investigations of discharges into the River Lemon at Newton Abbot |
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| 418 | Report on monitoring of environmental quality in the Severn Estuary |
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| 419 | Artificial recharge to groundwater in the Otter valley |
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| 420 | The Ely Ouse catchment management plan : final plan : January 1994 |
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| 421 | Water quality in Anglian Region : the first five years |
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| 422 | The environmental requirements of adult Atlantic salmon (Salmo salar L.) during their upstream migration in the Northwest Miramichi River, New Brunswick. Draft. |
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| 423 | Investigation to determine the cause of the long-term BOD failure at Higher Weaver routine monitoring site (70532960) for 1995 and 1997 |
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| 424 | Interim review of drought management experience in the North West Region of the National Rivers Authority. lessons learned (29th June 1995 - March 31st 1996) |
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| 425 | Monitoring of the Priory storm overflow on the River Tone at Taunton : June - November 1991 and water quality investigations unit January 1992 |
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