Studies on Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) needle cuticles S. Huttunen, M. Turunen and J. ReinikainenAnn. For. Sci., 46 Supplement (1989) 553s-556sDOI: https://doi.org/10.1051/forest:198905ART0125