2. "O que aprendi com os camponenses do Maranhão."O Companheiro, (1979 October 9).

2. "O que aprendi com os camponenses do Maranhão."O Companheiro, (1979 October 9)., 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/372215 Accessed September 26, 2026.