6776 | Herbarium Image: Carex aquatilis |
6777 | Herbarium Image: Persicaria amphibia |
6778 | Herbarium Image: Persicaria amphibia |
6779 | Herbarium Image: Persicaria hydropiper |
6780 | Herbarium Image: Eleocharis palustris |
6781 | Herbarium Image: Persicaria amphibia |
6782 | Herbarium Image: Schoenoplectus lacustris |
6783 | Herbarium Image: Schoenoplectus tabernaemontani |
6784 | A report on the use of pesticides at two Hampshire watercress farms |
6785 | A field guide to the British seaweeds : as required for assistance in the classification of water bodies under the Water Framework Directive |
6786 | Radiation Experiments on Aquatic Organisms |
6787 | Impact Of Conifer Harvesting And Replanting On Upland Water Quality |
6788 | Porth, Gluvian and Menalhyl catchment river water quality classification 1990 |
6789 | River Cober catchment river water quality classification 1991 |
6790 | River Fal catchment river water quality classification 1990 |
6791 | Fact sheet for the RBCA tool kit for chemical releases |
6792 | River Fal catchment river water quality classification 1991 |
6793 | River Par and Crinnis catchment river water quality classification 1990 |
6794 | River Par and Crinnis catchment river water quality classification 1991 |
6795 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1990 |
6796 | The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall |
6797 | A draft code of practice for analytical quality control in National Rivers Authority laboratories |
6798 | Control samples for ph determination in low ionic strength waters |
6799 | Proposals to introduce operator monitoring assessment for emissions to air from processes regulated under integrated pollution control : consultation paper |
6800 | Cryptosporidium in drinking water : survey of occurrence. June 1991 |