3476 | Paraleptophlebia submarginata |
3477 | Enhancing the River Tamar |
3478 | Diagnostic Drawing: Conjugales, |
3479 | Policy and practice for the protection of groundwater - Thames region appendix |
3480 | River Flow Indexing using benthic macroinvertebrates |
3481 | Information [on the NRA Anglian Region] |
3482 | Policy and practice for the protection of floodplains |
3483 | Front Cover of Turbulence in Lakes and Rivers |
3484 | Maidenhead, Windsor and Eton flood alleviation scheme water quality study : final report appendices |
3485 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
3486 | Ecdyonurus insignis |
3487 | Diagnostic Drawing: Chrysophyceae, |
3488 | Diagnostic Drawing: Conjugales desmids, |
3489 | Herbarium Image: Arenaria serpyllifolia |
3490 | Diagnostic Drawing: Cryptophyceae, |
3491 | Diagnostic Drawing: Cyanobacteria, |
3492 | Guardian of the water environment |
3493 | Drought : the dry facts |
3494 | Heptagenia fuscogrisea |
3495 | South West Region Plan Summary 1991/1992 |
3496 | Preventing the spread of crayfish plague in the South West |
3497 | Diagnostic Drawing: Cyanobacteria associated with tufa, |
3498 | Electron Microscope Image: Asterionella parasitised by Chytrid microfungus |
3499 | A map of the Queen Elizabeth National Park and the area in which the IBP L. George team were situated from late 1966 to 1972. |
3500 | National Rivers Authority 1993/94 corporate plan and forward look to 1996/97 : summary |