1. "As 3 características fundamentais da sociedade brasileira atual." N.p.:, 1973 January.

1. "As 3 características fundamentais da sociedade brasileira atual." N.p.:, 1973 January., Box: 11. 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/373109 Accessed September 25, 2026.