87Sr/86Sr isotopic ratios in vineyard soils and varietal wines from Douro Valley S. Catarino, F.P. Castro, J. Brazão, L. Moreira, L. Pereira, J.R. Fernandes, J.E. Eiras-Dias, A. Graça and P. Martins-Lopes BIO Web Conf., 12 (2019) 02031 Published online: 19 February 2019 DOI: 10.1051/bioconf/20191202031