| Title | Authors | Year | 
|---|---|---|
| Effects of nitrogen loading on wetland ecosystems, with particular reference to atmospheric deposition | 
                               Morris, J.T…  | 
                                                                                        1991 | 
| Proceedings of the 2nd workshop on sources of variation in ecotoxicological tests with Daphnia magna | 
                               Van der…  | 
                                                                                        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 | 
| Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation | 
                               Maitland, P…  | 
                                                                                        1991 | 
| Nitrate in soil water | 
                               Westling, O…  | 
                                                                                        1991 | 
| Acid Rain - Critical and Target Load Maps for the United Kingdom | 
                               Environment…  | 
                                                                                        1991 | 
| Atmospheric Transport of Iron and Its Deposition in the Ocean | 
                               Duce, R. A…  | 
                                                                                        1991 | 
| Nitrogen Uptake and Allocation by Calluna-Vulgaris (L) Hull and Deschampsia-Flexuosa (L) Trin Exposed to 15NH3 | 
                               Dueck, T.A…  | 
                                                                                        1991 |