"MSTA takes POW plea to Paris: Missouri Delegation visits three hours with Viet-Cong" in American Prisoners of War in Southeast Asia, 1971: Hearings before the Subcommittee on National Security Policy and Scientific Developments of the Committee on Foreign Affairs House of Representatives, Ninety-Second Congress, First Session,, March 23, 24, 25, 30, 31; April 1, 6, 20, 1971, Box: 2, Folder: 7. The Dr. David A. Otto, Special Envoy for the Missouri State Teachers Association during the time of the 1971 Paris Peace Talks, collection, RH MS 1257. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/32526 Accessed May 16, 2024.