1. Nitrogen saturation in northern forest ecosystems;Aber;Bioscience,1989
2. Chemical Analysis of Ecological Materials;Allen,1989
3. Weathering in Scottish and Norwegian catchments;Bain,1990
4. New perspectives on forest decline;Blank;Nature,1988
5. Ecological effects of nitrogen oxides and hydrocarbons on Central European forests;Blank;Institute of Mechanical Engineers,1987