| 401 | The use of air cooled blastfurnace slag as an unbound aggregate in the construction industry : BACMI/Environment Agency joint guidelines |
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| 402 | Recorded data from the Swan Hills weather station (weather station 1) in the Wensum Catchment between 2010-2011 |
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| 403 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 1998-March 1999 |
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| 404 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2001 |
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| 405 | A report on the 1993 strategic stock assessment survey of the Eamont catchment with particular reference to salmonid fish |
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| 406 | Brown trout habitat assessment on the River Bela catchment (as recommended by the strategic fisheries stock Assessment Task Group 1995) |
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| 407 | An investigation of ecological change in the rivers Kennet and Lambourn. Report for the period April 2000 - March 2001 |
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| 408 | Investigation into the 1999 failure of the European Community bathing waters directive at Teignmouth Town Beach (2001) |
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| 409 | An assessment of cormorant depredation on stillwater coarse fish populations in the Lea and Colne valleys of the Thames catchment |
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| 410 | A review of the quality and status of the Suffolk and Essex estuaries and coastal waters : volume 2 : final draft |
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| 411 | The hydrogeological classification of superficial clay : the hydrogeological characterisation of glacial till and glacio-lacustrine sediments in Shropshire |
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| 412 | A desk study of the available information on wintering waterfowl feeding in the Wash, Lincolnshire and Norfolk |
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| 413 | A Study of the Composition of Collected Household Waste in the United Kingdom - with particular reference to packaging waste |
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| 414 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995 |
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| 415 | An investigation of ecological change in the rivers Kennet and Lambourn. Progress report for the period April 1999-March 2000 |
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| 416 | Report on the quality of bathing waters in Hampshire, Sussex, Kent and the Isle of Wight : 1992 bathing season |
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| 417 | Guidance notes for local planning authorities on the methods of protecting the water environment through development plans |
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| 418 | 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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| 419 | The application of toxicity-based criteria for the regulatory control of wastewater dicharges Response compendium March 1997 |
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| 420 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996 |
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| 421 | Continuous water quality monitoring results collected from the river Torridge at Cockshilhay and Beam Bridge for the EU UWWTD |
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| 422 | Water quality objectives: procedures used by the NRA for the purpose of surface waters river ecosystem) (classification) regulations 1994 |
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| 423 | Interim report on the environmental impacts of the drought on Yorkshire rivers April 1995 to April 1996 |
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| 424 | River Darent low flow alleviation. Annex 3 : plan for the Darent : report of the joint NRA/TWUL project team |
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| 425 | Conservation and recreation : the Wye challenge : towards a management strategy for the River Wye : summary report (bilingual) |
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