| Title | Authors | Year | 
|---|---|---|
| Acidic deposition: its nature and impacts | 
                               Last, F.T…  | 
                                                                                        1991 | 
| Physiological effects of long term exposure to low concentrations of SO2 and NH3 on poplar leaves. | 
                               Hove, L.W.A…  | 
                                                                                        1991 | 
| The effect of air quality on tree growth. | 
                               Lee, H.S.J…  | 
                                                                                        1990 | 
| Afforestation and Lake Acidification: A Comparison of Four Sites in Scotland. | 
                               Kreiser, A.…  | 
                                                                                        1990 | 
| Decline of carpophores of mycorrhizal fungi instand, of Pinus sylvestris | 
                               …  | 
                                                                                        1990 | 
| Large Lakes: ecological structure and function | 
                               Kilham, S.S…  | 
                                                                                        1990 | 
| Exchange of greenhouse gases between terrestrial ecosystems and the atmosphere | 
                               Bouwman, A.…  | 
                                                                                        1990 | 
| Cation-exchange properties and adaptation to soil acidity in bryophytes | 
                               Buscher, P…  | 
                                                                                        1990 | 
| Successional changes in the soft-water macrophyte vegetation of (sub)atlantic, sandy, lowland regions during this century | 
                               Arts, G.H.P…  | 
                                                                                        1990 | 
| Effects of ammonia, ammonium sulphate and sulphur dioxide on the frost sensitivity of Scots pine (Pinus sylvestris L.) | 
                               Dueck, T.A…  | 
                                                                                        1990 |