| Title | Authors | Year | 
|---|---|---|
| Hematological Parameters in Fish Channa punctatus Under the Stress of Manganese | 
                               Garg, V. K…  | 
                                                                                        1989 | 
| Global Emissions of Nitrogen and Sulfur-Oxides from 1860 to 1980 | 
                               Dignon, J…  | 
                                                                                        1989 | 
| Results of the harmful effects of water pollutants to Daphnia magna in the 21 day Reproduction Test | 
                               Kühn, R ;…  | 
                                                                                        1989 | 
| Interacting effects of soil acidity and canopy cover on the species composition of field layer vegetation in oak/hornbeam forests | 
                               Tyler, G.…  | 
                                                                                        1989 | 
| Forest decline and Air Pollution | 
                               Schulze, E.…  | 
                                                                                        1989 | 
| Determination of plant-available soil manganese | 
                               Reisenauer…  | 
                                                                                        1988 | 
| Long term changes in the acidity of forest soils in north east Scotland | 
                               Billett, M.…  | 
                                                                                        1988 | 
| Ecological Change in the Uplands | 
                               Ratcliffe,…  | 
                                                                                        1988 | 
| The response of the feather moss, pleurozium-schreberi, to 5 years of simulated acid precipitation in the canadian boreal forest | 
                               Hutchison,…  | 
                                                                                        1988 | 
| Environmental Health Criteria 61 Chromium | 
                               WHO,  | 
                                                                                        1988 |