| 6451 | Herbarium Image: Carex bigelowii |
|---|
| 6452 | Herbarium Image: Carex arenaria |
|---|
| 6453 | Herbarium Image: Elodea sp. |
|---|
| 6454 | Herbarium Image: Carex aquatilis |
|---|
| 6455 | Herbarium Image: Persicaria amphibia |
|---|
| 6456 | Herbarium Image: Persicaria amphibia |
|---|
| 6457 | Herbarium Image: Persicaria hydropiper |
|---|
| 6458 | Herbarium Image: Eleocharis palustris |
|---|
| 6459 | Herbarium Image: Persicaria amphibia |
|---|
| 6460 | Herbarium Image: Schoenoplectus lacustris |
|---|
| 6461 | Herbarium Image: Schoenoplectus tabernaemontani |
|---|
| 6462 | Best Management Practices to Reduce Diffuse Pollution from Agriculture |
|---|
| 6463 | A report on the use of pesticides at two Hampshire watercress farms |
|---|
| 6464 | Impact Of Conifer Harvesting And Replanting On Upland Water Quality |
|---|
| 6465 | Porth, Gluvian and Menalhyl catchment river water quality classification 1990 |
|---|
| 6466 | River Cober catchment river water quality classification 1991 |
|---|
| 6467 | River Fal catchment river water quality classification 1990 |
|---|
| 6468 | Fact sheet for the RBCA tool kit for chemical releases |
|---|
| 6469 | River Fal catchment river water quality classification 1991 |
|---|
| 6470 | River Par and Crinnis catchment river water quality classification 1990 |
|---|
| 6471 | River Par and Crinnis catchment river water quality classification 1991 |
|---|
| 6472 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1990 |
|---|
| 6473 | A draft code of practice for analytical quality control in National Rivers Authority laboratories |
|---|
| 6474 | Control samples for ph determination in low ionic strength waters |
|---|
| 6475 | Proposals to introduce operator monitoring assessment for emissions to air from processes regulated under integrated pollution control : consultation paper |
|---|
