4. Schweinberger, G. "Grandes propriedades ou propriedades familiares na agricultura?" N.p.:, undated

4. Schweinberger, G. "Grandes propriedades ou propriedades familiares na agricultura?" N.p.:, undated, Box: 21. 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/374945 Accessed September 26, 2026.