1. Boletim Informativo do Sindicato dos Engenheiros. Ano I n° 3, (1982 May-June).

1. Boletim Informativo do Sindicato dos Engenheiros. Ano I n° 3, (1982 May-June)., Box: 24. 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/375465 Accessed September 26, 2026.