| Title | Authors | Year | 
|---|---|---|
| Acid deposition: its nature and impacts | 
                               Last, F.T…  | 
                                                                                        1991 | 
| The yield of winter cereals exposed to sulphur dioxide under field conditions. | 
                               McLeod, A.R…  | 
                                                                                        1991 | 
| Acidic deposition: its nature and impacts | 
                               Last, F.T…  | 
                                                                                        1991 | 
| Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation | 
                               Maitland, P…  | 
                                                                                        1991 | 
| Acid Rain - Critical and Target Load Maps for the United Kingdom | 
                               Environment…  | 
                                                                                        1991 | 
| Atmospheric Transport of Iron and Its Deposition in the Ocean | 
                               Duce, R. A…  | 
                                                                                        1991 | 
| Influence of HN3 and (HN4)2 SO4 on heathland vegetation | 
                               Van der…  | 
                                                                                        1991 | 
| Forestry and soil protection in the UK | 
                               Moffatt, A.…  | 
                                                                                        1991 | 
| Physiological effects of long term exposure to low concentrations of SO2 and NH3 on poplar leaves. | 
                               Hove, L.W.A…  | 
                                                                                        1991 | 
| Comparisons of 3 Woodland Sites in NW Britain Differing in Richness of the Epiphytic Lobarion-Pulmonariae Community and Levels of Wet Acidic Deposition | 
                               Farmer, A.M…  | 
                                                                                        1991 |