1. Effects of sour gas processing on a forest ecosystem in west-central Alberta.;Addison;Can. For. Serv. Inf. Rep., NOR-X-265,1984
2. The influence of soil reaction on earthworms.;Arrhenius;Ecology,1921
3. Effects of experimental acidification on soil organisms and decomposition in a Scots pine forest.;Bååth;Pedobiologia,1980
4. Effects of sulphur contamination on macro-invertebrates in Canadian pine forests.;Cárcamo;Appl. Soil Ecol. (In press),1997
5. Notes on the impact of air pollution (SO2 & Pb) on spider (Araneae) populations in North Zealand, Denmark.;Clausen;Ent. Meddr,1984