| Title | Authors | Year | 
|---|---|---|
| Uptake, accumulation and translocation of arsenate in arsenate-tolerant and non-tolerant Holcus lanatus L. | Meharg, A. A… | 1991 | 
| Physiological-effects of long-term exposure to low concentrations of SO2 and NH3 on poplar leaves | Hove, L.W.A… | 1991 | 
| The yield of winter cereals exposed to sulphur dioxide under field conditions. | McLeod, A.R… | 1991 | 
| Acid deposition: its nature and impacts | Last, F.T… | 1991 | 
| The Distribution and Breeding Site Characteristics of Newts in Cumbria, England. | Denton, J.S… | 1991 | 
| Acidic deposition: its nature and impacts | Last, F.T… | 1991 | 
| Nitrate in soil water | Westling, O… | 1991 | 
| Acid Rain - Critical and Target Load Maps for the United Kingdom | Environment… | 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 |