1. The Sulfur cycle;Kellogg;Science,1972
2. Gaseous Pollutants from urban and natural sources;Robinson,1970
3. The yearly circulation of sulfur in nature;Eriksson;Journal of Geoph. Res.,1963
4. Deposition of sulfate and acid with precipitation over northern Europe;Granat,1972
5. Fissions of the disulfide link in dialkyl sulfides by scopulariopsis brevicaulis and methylation of the alkyl sulfur group;Challenger;Adv. in Enzymol.,1951