| 401 | Instream Flow Requirements of the River Wissey, Norfolk, Annex C - April 1993
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| 402 | A second stage evaluation of the Grant YSI3815 Water Logger |
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| 403 | The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall |
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| 404 | An investigation of sewage on the beach at Porthcothan |
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| 405 | The Test catchment southern : recommendations for statutory water quality objectives |
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| 406 | The Worcestershire Stour catchment : recommendations for statutory water quality objectives |
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| 407 | An assessment of river water quality in the River Kenn |
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| 408 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 409 | A survey of ferruginous minewater impacts in the Welsh coalfields |
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| 410 | Dioxins and the River Doe Lea : plain English report |
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| 411 | Temporal variability in chlorophyll-a : concentrations in the coastal environment : final report |
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| 412 | Locks and weirs on the river Thames : how do they work? |
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| 413 | The quality of rivers and estuaries in Northumbria region 1990 |
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| 414 | A guide to sustainable urban drainage : protecting the quality of our environment |
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| 415 | Estuarial migration of Atlantic salmon in the river Dee (North Wales) |
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| 416 | Doe Lea restoration study : the work of WRc |
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| 417 | Cyanobacteria (blue-green algae) in the south west region 1989 |
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| 418 | Toxic blue-green algae : a report by the National Rivers Authority |
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| 419 | Investigation of salinity in the river Thurne catchment of North East Norfolk |
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| 420 | Catchment abstraction management strategies (CAMS) and the Water Framework Directive (WFD) |
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| 421 | Managing water abstraction : the catchment abstraction management strategy process : April 2001 |
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| 422 | Water quality investigations in the Newlyn river catchment |
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| 423 | An assessment of water quality in the River Yarty catchment |
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| 424 | Investigations of discharges into the River Lemon at Newton Abbot |
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| 425 | Report on monitoring of environmental quality in the Severn Estuary |
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