| Title | Authors | Year | 
|---|---|---|
| Atmospheric Transport of Iron and Its Deposition in the Ocean | Duce, R. A… | 1991 | 
| Proceedings of the 2nd workshop on sources of variation in ecotoxicological tests with Daphnia magna | Van der… | 1991 | 
| The yield of winter cereals exposed to sulphur dioxide under field conditions. | McLeod, A.R… | 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 | 
| Mechansims of adaptions of plants to acid soils | Marschner,… | 1991 | 
| Zeigerwerte von Pflanzen in Mitteleuropa | Ellenberg,… | 1991 | 
| Influence of HN3 and (HN4)2 SO4 on heathland vegetation | Van der… | 1991 | 
| Acid deposition: its nature and impacts | Last, F.T… | 1991 | 
| Forestry and soil protection in the UK | Moffatt, A.… | 1991 | 
| Acidic deposition: its nature and impacts | Last, F.T… | 1991 |