251 | The Natural (Baseline) Quality Of Groundwaters In England And Wales: The Permo-Triassic Sandstones Of Cumbria, North-West England; |
252 | The River Eden Demonstration Test Catchment (DTC) Data |
253 | Environmental snapshot for the East of England [version 1] |
254 | Disturbing the season's due: plankton periodicity in Grassmere, 1987 |
255 | The Impact Of Particulate Outputs Associated With Timber Harvesting |
256 | The evaluation of Grant/YSU 3800 water quality monitor |
257 | Pesticides in the aquatic environment 1997 full report |
258 | The Wandle, Beverley Brook, Hogsmill catchment management plan : consultation report : November 1994 |
259 | The precious resource : a brief guide to managing our water resources |
260 | Priority and other specific polluting substances and the Water Framework Directive |
261 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
262 | Problems with sea trout and salmon in the Western Highlands |
263 | Clear Options towards an operational model for the Lee Valley Reservoirs |
264 | The Cam catchment : recommendations for statutory water quality objectives |
265 | The National Centre for Toxic and Persistent Substances |
266 | Algal blooms in the Lower Tees- Perspectives and prospects
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267 | The Warwickshire Avon catchment management plan : final plan : October 1994 |
268 | Water from the River Dee : a working partnership |
269 | Land drainage byelaws 1981 and the Thames region flood defence byelaws 1991 |
270 | River quality in England and Wales : a report of the 1990 survey |
271 | Snapshots of the environment : understanding coastal water quality |
272 | The Influence of Variations in Flow on General Quality Assessment of Rivers |
273 | The Mersey estuary : a report on environmental quality |
274 | Catches of migratory fish in the River Don, Aberdeenshire |
275 | Stream survey and assessment in the Ashford and Folkestone areas |