| Title | Authors | Year |
|---|---|---|
| Seasonal variations in acidic pollutant inputs and their effects on the chemistry of stemflow, bark and epiphyte tissues in three oak woodlands in N.W. Britain |
Farmer, A.M… |
1991 |
| Zeigerwerte von Pflanzen in Mitteleuropa |
Ellenberg,… |
1991 |
| Nitrogen Uptake and Allocation by Calluna-Vulgaris (L) Hull and Deschampsia-Flexuosa (L) Trin Exposed to 15NH3 |
Dueck, T.A… |
1991 |
| Acid 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 |
| Acidic deposition: its nature and impacts |
Last, F.T… |
1991 |
| Effects of sulphur dioxide on the development of fungal diseases of winter barley in an open-air fumigation system. |
Mansfield,… |
1991 |
| Decline of ectomycorrhizal fungi in Europe. |
Arnolds, E… |
1991 |
| Acid Rain - Critical and Target Load Maps for the United Kingdom |
Environment… |
1991 |
| Environmental Health Criteria 125 Platinum |
WHO, |
1991 |