251 | Guardians of the water environment (bilingual document) |
252 | Pesticides in the aquatic environment 1996 |
253 | Constructive thinking : save water, save the environment |
254 | The Environment Agency navigations : Thames, Anglian, Southern |
255 | Sustainable water resources for the future |
256 | Pollution control on the River Alt |
257 | A Review of the Application of |
258 | Ecology and the Water Framework Directive |
259 | Snapshots of the environment : regulating major industry |
260 | 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 |
261 | Review of the microtox toxicity test |
262 | Silt - and its effects on the river |
263 | MCERTS : the Environment Agency's monitoring certification scheme |
264 | The effects of predation on salmon fisheries |
265 | Fisheries Assessment Software within the Environment Agency |
266 | Bewdley flood defences : the invisible defences |
267 | The story of a river : Ripples 1 |
268 | Recreation strategy for the River Thames |
269 | Information [on the NRA Anglian Region] |
270 | The river Aire conservation within the catchment : a summary of survey methods and information held on the wildlife of the river Aire catchment |
271 | Navigations in the Anglian region (EA) |
272 | The Atlantic Salmon Trust Journal 2011 |
273 | Holding back the sea - ripples 3 |
274 | Fish, fisheries and the Water Framework Directive |
275 | A history of the By Brook |