Bergholm, J. (2001). Long-term effects of enhanced nitrogen and sulphate additions on soil acidification and nutrient cycling in a Norway spruce stand. Swedish University of Agricultural Sciences.
Lua i Stíl Chicago (17ú heag.)Bergholm, Johan. Long-term Effects of Enhanced Nitrogen and Sulphate Additions on Soil Acidification and Nutrient Cycling in a Norway Spruce Stand. Uppsala: Swedish University of Agricultural Sciences, 2001.
Lua MLA (8ú heag.)Bergholm, Johan. Long-term Effects of Enhanced Nitrogen and Sulphate Additions on Soil Acidification and Nutrient Cycling in a Norway Spruce Stand. Swedish University of Agricultural Sciences, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.