Fraga, Nilson Cesar. “Expediente GEOGRAPHIA OPPORTUNO TEMPORE - V. 6, N. 1 (2020)”. Geographia Opportuno Tempore, vol. 6, nº 1, abril de 2020, p. 1-8, https://ojs.uel.br/revistas/uel/index.php/Geographia/article/view/39936.