251 | Water Quality of the Humber Estuary 1986 |
252 | Freshwater Algal Flora of the British Isles |
253 | Green Household Index - The Eco-Cal |
254 | Guardians of the water environment (bilingual document) |
255 | Pesticides in the aquatic environment 1996 |
256 | Constructive thinking : save water, save the environment |
257 | The Environment Agency navigations : Thames, Anglian, Southern |
258 | Sustainable water resources for the future |
259 | Pollution control on the River Alt |
260 | A Review of the Application of |
261 | Ecology and the Water Framework Directive |
262 | Snapshots of the environment : regulating major industry |
263 | 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 |
264 | Review of the microtox toxicity test |
265 | Silt - and its effects on the river |
266 | MCERTS : the Environment Agency's monitoring certification scheme |
267 | The effects of predation on salmon fisheries |
268 | Fisheries Assessment Software within the Environment Agency |
269 | Bewdley flood defences : the invisible defences |
270 | The story of a river : Ripples 1 |
271 | Recreation strategy for the River Thames |
272 | Information [on the NRA Anglian Region] |
273 | The river Aire conservation within the catchment : a summary of survey methods and information held on the wildlife of the river Aire catchment |
274 | Navigations in the Anglian region (EA) |
275 | The Atlantic Salmon Trust Journal 2011 |