Fraga, Nilson Cesar. “Editorial GEOGRAPHIA OPPORTUNO TEMPORE - V. 6, N. 1 (2020)”. Geographia Opportuno Tempore, vol. 6, no. 1, Apr. 2020, pp. 262-6, https://ojs.uel.br/revistas/uel/index.php/Geographia/article/view/39937.