3526 | Diagnostic Drawing: Charophyceae, |
3527 | Paraleptophlebia submarginata |
3528 | Enhancing the River Tamar |
3529 | Diagnostic Drawing: Conjugales, |
3530 | Policy and practice for the protection of groundwater - Thames region appendix |
3531 | River Flow Indexing using benthic macroinvertebrates |
3532 | Information [on the NRA Anglian Region] |
3533 | Policy and practice for the protection of floodplains |
3534 | Front Cover of Turbulence in Lakes and Rivers |
3535 | Maidenhead, Windsor and Eton flood alleviation scheme water quality study : final report appendices |
3536 | 'Sea Vigil' water quality monitoring : the Wash 1992-1993 |
3537 | Ecdyonurus insignis |
3538 | Diagnostic Drawing: Chrysophyceae, |
3539 | Diagnostic Drawing: Conjugales desmids, |
3540 | Herbarium Image: Arenaria serpyllifolia |
3541 | Diagnostic Drawing: Cryptophyceae, |
3542 | Diagnostic Drawing: Cyanobacteria, |
3543 | Guardian of the water environment |
3544 | Drought : the dry facts |
3545 | Heptagenia fuscogrisea |
3546 | South West Region Plan Summary 1991/1992 |
3547 | Preventing the spread of crayfish plague in the South West |
3548 | Diagnostic Drawing: Cyanobacteria associated with tufa, |
3549 | Electron Microscope Image: Asterionella parasitised by Chytrid microfungus |
3550 | 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. |