| 251 | National marine baseline survey 1995 : littoral cell 11 : Great Orme to the Solway Firth |
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| 252 | Microbiological examination of coastal waters in the North West : summary of results 1998 |
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| 253 | Bathing water quality in England and Wales in 1993 : report of the National Rivers Authority |
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| 254 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
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| 255 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 256 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 257 | Two year aesthetic survey of beaches in the South West (1990 and 1991) |
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| 258 | The Influence of Variations in Flow on General Quality Assessment of Rivers - Summary Document |
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| 259 | Annual classification of river water quality 1992 : numbers of samples exceeding the quality standard |
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| 260 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 261 | Improved monitoring for surface water quality : the development of a manual of best practice |
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| 262 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2011 |
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| 263 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk B in 2011 |
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| 264 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk A |
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| 265 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk E |
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| 266 | Environment Agency Kent area : the Seabrook stream : BSc (Hons) Environmental biology placement report |
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| 267 | Future foundations : building a better South West : a sustainable construction charter for the region |
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| 268 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : AQC audit |
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| 269 | An audit of performance in the analysis of biological samples in 1998. Environment Agency : primary audit |
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| 270 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : AQC audit |
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| 271 | An audit of performance in the analysis of biological samples in 1999. Environment Agency : primary audit |
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| 272 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk B |
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| 273 | Further investigation of the pilot borehole at Bean's Lane, Wortham (94/7/912) : September 1994 |
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| 274 | An assessment of mercury contamination in the Red River catchment : final draft report |
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| 275 | River Avon, Bath : aesthetic study of riverbanks through the urban area of Bath : final report |
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