Variation in wood properties among five full-sib families of Norway spruce (Picea abies) Arne Steffenrem, Pekka Saranpää, Sven-Olof Lundqvist and Tore SkrøppaAnn. For. Sci., 64 8 (2007) 799-806DOI: https://doi.org/10.1051/forest:2007062