This airgram from the U.S. State Department provides a list of participants in the Tri-Continental Conference at Havana.:
Citation
Ball,
"List of Participants in Tri-Continental Conference at Havana"
(1966).
Opening the Archives: Documenting U.S.-Brazil Relations, 1960s-80s.
Brown Digital Repository. Brown University Library.
https://repository.library.brown.edu/studio/item/bdr:6j5eyn25/
Opening the Archives is a joint effort by Brown University and the Universidade Estadual de Maringá, Paraná, Brazil to digitize and index 100,000 U.S. State Department documents on Brazil from 1963-73 and make them available to the public on a …
