| Title | Authors | Year | 
|---|---|---|
| Statutory Instrument (1989): The Sludge (Use in Agriculture) Regulations | 
                               HMSO,  | 
                                                                                        1989 | 
| Interacting effects of soil acidity and canopy cover on the species composition of field layer vegetation in oak/hornbeam forests | 
                               Tyler, G.…  | 
                                                                                        1989 | 
| Simulation of the long-term soil response to acid deposition in various buffer ranges | 
                               Vries, W.;…  | 
                                                                                        1989 | 
| Forest decline and Air Pollution | 
                               Schulze, E.…  | 
                                                                                        1989 | 
| The acidification of Scottish lochs | 
                               Battarbee,…  | 
                                                                                        1989 | 
| Long term changes in the acidity of forest soils in north east Scotland | 
                               Billett, M.…  | 
                                                                                        1988 | 
| Determination of plant-available soil manganese | 
                               Reisenauer…  | 
                                                                                        1988 | 
| Ecological Change in the Uplands | 
                               Ratcliffe,…  | 
                                                                                        1988 | 
| Environmental Health Criteria 61 Chromium | 
                               WHO,  | 
                                                                                        1988 | 
| Critical Loads for Sulphur and Nitrogen | 
                               Nilsson, J…  | 
                                                                                        1988 |