| Title | Authors | Year | 
|---|---|---|
| Nitrogen and phosphorus concentrations and N:P ratios in Norwegian lakes. Perspective on nutrient limitation | Faafeng, B… | 1993 | 
| Impacts of sulphur and nitrogen deposition on sites and species of nature conservation importance in Great Britain | Woodin, S.J… | 1993 | 
| Estimating the relative contribution of SOx, NOx and NHx inputs to effects of atmospheric deposition | Sutton, M.A… | 1993 | 
| Insects and Pollution | Helivvaara… | 1993 | 
| Dissolved inorganic nitrogen budget for a forested catchment at Beddgelert, North Wales | Stevens, P.… | 1993 | 
| Atmospheric deposition of sulphur and nitrogen in heathland ecosystems. | Bobbink, R… | 1993 | 
| Critical Loads - Concepts and Applications | Cresser, M.… | 1993 | 
| Observations on the changes in nitrate concentrations in seven upland moorland catchments in north eastern Scotland | Black, K.E… | 1993 | 
| Critical loads for peat soils | Cresser, M.… | 1993 | 
| The Deposition of Atmospheric Ammonia and Its Effects on Plants | Pearson, J… | 1993 |