FORESTA MARTIN, Franco. The Obsidian Sieve: an Excel‑Based Tool for Provenance Studies. Annals of Geophysics, [S. l.], v. 69, 2026. DOI: 10.4401/ag-9511. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/9511. Acesso em: 1 apr. 2026.