The Allen-Unger Global Commodity Prices Database. Research Data Journal for the Humanities and Social Sciences, [S. l.], v. 4, p. 1–10, 2019. DOI: 10.1163/24523666-00401006. Disponível em: https://researchdatajournal.org/article/view/24730.. Acesso em: 29 nov. 2025.