1. Acid precipitation-effects on forest ecosystems;Abrahamsen,1976
2. Impact of atmospheric sulfur deposition on forest ecosystems;Abrahamsen,1980
3. Effects of acid deposition on forest vegetation;Abrahamsen,1979
4. Effects of artificial acid rain and liming on soil organisms and the decomposition of organic matter;Abrahamsen,1980
5. Impacts of acid precipitation on coniferous forest ecosystems;Abrahamsen,1975