Afif-Khouri, E., Camara Obregon, M. A., Oliveira-Prendes, J. A., Gorgoso-Valera, J. J., & Canga-Libano, E. (2010). Relationship among soil parameters, tree nutrition and site index of Pinus radiata D. Don in Asturias, NW Spain. Forest Systems, 19(1), 77-88. https://doi.org/10.5424/fs/2010191-01169