| 251 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk F |
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| 252 | Proceedings of the conference National Minewaters 20th -21st April 1998 Tapton Hall Sheffield University |
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| 253 | Distribution of Macroinvertebrates in English and Welsh Rivers based on the 1995 Survey |
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| 254 | The disposal of sheep dip waste (R and D Report 11) : effects on water quality |
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| 255 | Routine laboratory water sample data for the Wensum Demonstration Test Catchment's monitoring kiosk F |
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| 256 | Quantification of the relationship between effluent quality and biological quality : interim report for stage 1 |
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| 257 | Bathing water quality in England and Wales in 1995 : report of the National Rivers Authority |
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| 258 | ISCO automatic water sample data for the Wensum Demonstration Test Catchment's Kiosk M |
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| 259 | YSI, turbidity and discharge data for the Wensum Demonstration Test Catchment's monitoring kiosk M in 2014 |
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| 260 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk A in 2012 |
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| 261 | A report on water quality issues within the Midford Brook catchment - June 1996 |
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| 262 | National marine baseline survey 1995 : littoral cell 11 : Great Orme to the Solway Firth |
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| 263 | Investigation into the frequency of storm overflow operation at Bradworthy sewage treatment works (1996) |
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| 264 | Microbiological examination of coastal waters in the North West : summary of results 1998 |
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| 265 | Report on the By Brook low flow investigations : October 2001 : volume 2 : (figures, maps and appendices) |
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| 266 | Bathing water quality in England and Wales in 1993 : report of the National Rivers Authority |
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| 267 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report summary : November 1994 |
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| 268 | A study to investigate and propose remedies for river quality problems in the Madford catchment |
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| 269 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
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| 270 | Water pollution incidents in England and Wales - 1990 : report of the National Rivers Authority |
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| 271 | The Influence of Variations in Flow on General Quality Assessment of Rivers - Summary Document |
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| 272 | Annual classification of river water quality 1992 : numbers of samples exceeding the quality standard |
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| 273 | Water pollution incidents in England and Wales 1991 : report of the National Rivers Authority |
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| 274 | Improved monitoring for surface water quality : the development of a manual of best practice |
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| 275 | YSI, turbidity and stage data for the Wensum Demonstration Test Catchment's monitoring kiosk D in 2011 |
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