1. Hébette, Jean, and Acevedo, Rosa Elizabeth. "Mobilidade do trabalho e fronteira amazónica a Belém-Brasília." Belém:, 1980 August.

1. Hébette, Jean, and Acevedo, Rosa Elizabeth. "Mobilidade do trabalho e fronteira amazónica a Belém-Brasília." Belém:, 1980 August., Box: 21, Folder: 18. 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/374909 Accessed September 26, 2026.