1. Effects of acid precipitation in biochemical activities in soil;Alexander,1980
2. Effects of artificial acid rain on microbial activity and biomass;Bååth;Bull. Environ. Contam. Toxicol.,1979
3. Use of plastic film for aeration in soil incubation experiments;Bremmer;Soil Biol. Biochem.,1971
4. Mineralization of Organic Nitrogen in Soil;Harmsen,1955
5. Studier över barrskogens humustäcke, dess egenskaper och beroende av skogsvården;Hesselman;Medd. Statens Skogsförsöksant.,1926