Arvidsson, H. (2001). Wood ash application in spruce stands: Effects on ground vegetation, tree nutrient status and soil chemistry. Swedish University of Agricultural Sciences.
Lua i Stíl Chicago (17ú heag.)Arvidsson, Helen. Wood Ash Application in Spruce Stands: Effects on Ground Vegetation, Tree Nutrient Status and Soil Chemistry. Uppsala: Swedish University of Agricultural Sciences, 2001.
Lua MLA (8ú heag.)Arvidsson, Helen. Wood Ash Application in Spruce Stands: Effects on Ground Vegetation, Tree Nutrient Status and Soil Chemistry. Swedish University of Agricultural Sciences, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.