“Determination of Provenance by FTIR Spectroscopy, of an Amber Bead from the Megalithic Tomb of La Velilla (Osorno, Palencia)”. BSAA arqueología, no. LXXXIII (April 24, 2018): 71–94. Accessed November 27, 2025. https://revistas.uva.es/index.php/bsaaarq/article/view/1950.