Impacts of Prices on Brazil’s Natural Rubber Exports in Four Historical Periods over 198 Years. Global Journal of Human-Social Science, [S. l.], v. 26, n. E1, p. 7–14, 2026. DOI: 10.34257/GJHSSE253232. Disponível em: https://socialscienceresearch.org/index.php/GJHSS/article/view/104571. Acesso em: 10 jul. 2026.