1.Frente Operária ano XXVIII, no. 364 [Porta-voz do pensamento posadista no Brasil], (1980 August 21 -1980 September 1).

1.Frente Operária ano XXVIII, no. 364 [Porta-voz do pensamento posadista no Brasil], (1980 August 21 -1980 September 1)., Box: 6. 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/372410 Accessed September 26, 2026.