1. "Festa popular da Conquista da Antiga Àrea Ferro Costa." N.p.:, undated [ca. 1983 January].

1. "Festa popular da Conquista da Antiga Àrea Ferro Costa." N.p.:, undated [ca. 1983 January]., Box: 21. Eduardo Sarno Collection of Leftist Movements in Brazil, 2002-03. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/374821 Accessed September 26, 2026.