| 451 | A report on the 1993 strategic stock assessment survey of the Eamont catchment with particular reference to salmonid fish |
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| 452 | Brown trout habitat assessment on the River Bela catchment (as recommended by the strategic fisheries stock Assessment Task Group 1995) |
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| 453 | Appendix to the biodiversity strategy and action plan for the Environment Agency (Thames Region) : costed action plan 2000-2003 |
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| 454 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 2000 - March 2001 |
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| 455 | Investigation into the 1999 failure of the European Community bathing waters directive at Teignmouth Town Beach (2001) |
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| 456 | An assessment of cormorant depredation on stillwater coarse fish populations in the Lea and Colne valleys of the Thames catchment |
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| 457 | Evaluation of FRONTIERS accumulation forecasts in the NRA Thames and North West regions : final report of the Joint Met |
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| 458 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 2 : final draft |
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| 459 | The hydrogeological classification of superficial clay : the hydrogeological characterisation of glacial till and glacio-lacustrine sediments in Shropshire |
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| 460 | A desk study of the available information on wintering waterfowl feeding in the Wash, Lincolnshire and Norfolk |
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| 461 | A Study of the Composition of Collected Household Waste in the United Kingdom - with particular reference to packaging waste |
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| 462 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995 |
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| 463 | Tributyltin in the aquatic environment : final report to the National Rivers Authority September 1990 to September 1992 |
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| 464 | A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids |
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| 465 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
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| 466 | Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season |
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| 467 | The development of biomanipulation techniques and control of phosphorus release from sediments (475/1/A) : LIFE project : restoration of the Norfolk Broads |
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| 468 | The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997 |
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| 469 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996 |
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| 470 | Preliminary modelling of water storage and transfers in the Anglian region : supporting documentation for the regional water resources strategy May 1993 |
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| 471 | Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD |
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| 472 | Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994 |
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| 473 | Mercury, methylmercury and copper in the River Yare, Norfolk : summary of a report to the National Rivers Authority, Anglian Region |
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| 474 | Second interim report on the environmental impacts of the drought on Yorkshire's rivers April 1995 to April 1996 |
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| 475 | A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids |
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