| 251 | Broads restoration project : first year report 1990 |
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| 252 | Summary report on blue-green algae toxin analysis, Toxicity Assessment and reporting to the Environment Agency, 1998 |
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| 253 | A review of hazardous substances |
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| 254 | Nutrient export modelling on the River Bure, Norfolk : progress report 2 : June-July 1995 |
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| 255 | An audit of performance in the processing of macro-invertebrate samples in 1992 |
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| 256 | Teign estuary post scheme appraisal report of 1991 surveys : final draft report |
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| 257 | Devon area internal report - the kingsbridge estuary - survey of the benthic microinvertebrate infauna (october 1990) for the proposed classification of estuaries in the south western region |
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| 258 | Lake Benthic Macroinvertebrates 1: Improving Sampling Methodology |
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| 259 | River Deben estuary subtidal biological survey, March 1992 |
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| 260 | Medway Estuary fisheries survey 2000 : (incorporating the report for 1997 to 2000) |
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| 261 | Heavy metals, polychlorinated biphenyl and organochlorine pesticide residues in European eels anguilla anguilla L. from Sussex rivers - appendices : draft : part II |
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| 262 | Zinc in estuaries (Note 390) |
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| 263 | Remote sensing and baseline monitoring of the coastal waters of England and Wales 1992-1993 : a survey report [external version] |
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| 264 | Validation of statutory sampling sites using aerial surveillance : case study 4 |
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| 265 | Coastal baseline survey 1990-93. Part 1 : nutrients |
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| 266 | River nar eutrophication study aquatic macrophyte survey |
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| 267 | Field validation of algal toxin test kit : progress report for period August 1992 - October 1992 |
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| 268 | Review of water quality instrumentation : April 1995 |
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| 269 | Audit report on the 1995 GQA biological survey |
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| 270 | Development of marine phytoplankton methodology and quality assurance procedures : second draft |
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| 271 | The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall |
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| 272 | Control samples for ph determination in low ionic strength waters |
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| 273 | European collaboration to develop standard sediment toxicity test methods (396/4/T) : interim report |
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| 274 | Silloth sediment survey : April, July 1990 |
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| 275 | An assessment of river water quality in the River Kenn |
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