3.Bandeira Vermelha V, no. 218., (1980 March 19).

3.Bandeira Vermelha V, no. 218., (1980 March 19)., Box: 5. 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/372211 Accessed September 26, 2026.