1. "A estratégia e a tática dos marxistas brasileiros (um esboço inicial-1980)." N.p.:, undated

1. "A estratégia e a tática dos marxistas brasileiros (um esboço inicial-1980)." N.p.:, undated, Box: 2, Folder: 12. 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/370453 Accessed September 26, 2026.