451 | Potamogeton perfoliatus |
452 | Stachys arvensis |
453 | Pilularia |
454 | Macroinvertebrates |
455 | Rhithrogena haarupi |
456 | Carex canescens |
457 | Trapa natans |
458 | Newby Beck Control Sub-Catchment (Sleagill Beck) Discharge and Water Quality |
459 | Isolepis setacea |
460 | Eden DTC Invertebrate Data |
461 | Impatiens parviflora |
462 | Bank-side monitoring of river hydrology and water quality, Sem at Cool's Cottage, Hampshire Avon catchment |
463 | Tofieldia pusilla |
464 | Carex pallescens |
465 | Dinoflegellata |
466 | Drosera |
467 | Leptophlebia vespertina |
468 | Ephemerellidae |
469 | Potamogeton obtusifolius |
470 | Neoergasilus japonicus |
471 | Esthwaite Water Seismic Survey 1983 |
472 | Aira caryophyllea |
473 | Laboratory analysis of water samples, Ebble upstream, Hampshire Avon catchment |
474 | Lythrum portula |
475 | Oenanthe lachenalii |