226 | Herbarium Image: Najas flexilis |
227 | Herbarium Image: Glyceria fluitans |
228 | An assessment of changing nutrient inputs to Windermere and their influence on water quality and charr population dynamics |
229 | National marine baseline survey 1995 : Gulliver manual and CD-ROM questions |
230 | Herbarium Image: Potamogeton praelongus |
231 | Presentation on river catchment management plans |
232 | Herbarium Image: Saxifraga hypnoides |
233 | Herbarium Image: Carex nigra |
234 | NRA Corporate Plan 1992-1993 |
235 | Herbarium Image: Carex elata |
236 | Herbarium Image: Filipendula ulmaria |
237 | Demands and resources of water undertakers in England and Wales : preliminary report under Section 143(2)(a) Water Act 1989 |
238 | Herbarium Image: Festuca arundinacea |
239 | Herbarium Image: Eupatorium cannabinum |
240 | Herbarium Image: Helictotrichon pubescens |
241 | Herbarium Image: Huperzia selago |
242 | The River Cam catchment management plan : annual monitoring report |
243 | River Tyne index report : report two, 2005 |
244 | Discharge consents : monitoring, compliance and pollution load 1997 |
245 | Herbarium Image: Najas flexilis |
246 | Herbarium Image: Sparganium natans |
247 | Herbarium Image: Elatine hexandra |
248 | Guide to groundwater vulnerability mapping in England and Wales |
249 | Salmonid and freshwater fisheries statistics for England and Wales, 1990. |
250 | Floodlink : Midlands region : Issue 2 - Winter 2002 |