251 | Monitoring the trophic state of reservoirs
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252 | Flood defences : the Lower Witham strategy |
253 | Water Quality of the Humber Estuary 1986 |
254 | Freshwater Algal Flora of the British Isles |
255 | Green Household Index - The Eco-Cal |
256 | Guardians of the water environment (bilingual document) |
257 | Pesticides in the aquatic environment 1996 |
258 | Constructive thinking : save water, save the environment |
259 | The Environment Agency navigations : Thames, Anglian, Southern |
260 | Sustainable water resources for the future |
261 | Pollution control on the River Alt |
262 | A Review of the Application of |
263 | Ecology and the Water Framework Directive |
264 | Snapshots of the environment : regulating major industry |
265 | The introduction of an effective market testing programme for the flood defence function of the National Rivers Authority in the North West Region : certificate in management |
266 | Review of the microtox toxicity test |
267 | Silt - and its effects on the river |
268 | MCERTS : the Environment Agency's monitoring certification scheme |
269 | The effects of predation on salmon fisheries |
270 | Fisheries Assessment Software within the Environment Agency |
271 | Bewdley flood defences : the invisible defences |
272 | The story of a river : Ripples 1 |
273 | Recreation strategy for the River Thames |
274 | Information [on the NRA Anglian Region] |
275 | The river Aire conservation within the catchment : a summary of survey methods and information held on the wildlife of the river Aire catchment |