| Title | Authors | Year |
|---|---|---|
| Zeigerwerte von Pflanzen in Mitteleuropa |
Ellenberg,… |
1991 |
| Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation |
Maitland, P… |
1991 |
| Forest decline, nutrient supply and diagnostic fertilisation in southwestern Germany and in southern California. |
Huettl, R.F… |
1990 |
| Mechanism of toxicity of zinc to the marine diatom Nitzschia closterium |
Stauber, J… |
1990 |
| The effect of air quality on tree growth. |
Lee, H.S.J… |
1990 |
| Air pollution and agricultural aphid pests. I: Fumigation experiments with SO2 and NO2. |
Houlden, G… |
1990 |
| Decline of carpophores of mycorrhizal fungi instand, of Pinus sylvestris |
… |
1990 |
| Forest soil chemical changes between 1949-50 and 1987 |
Billett, M.… |
1990 |
| Effects of nitrogen dioxide pollution on the growth of 3 fern species. |
Ashenden, T… |
1990 |
| The variation in the acidity of ground and surface waters in Northern Ireland |
Jordan, C… |
1990 |