Correspondence with Policy Officer for Eastern Asian Affairs Ivan Izenberg regarding Washington and Paris visits, April 19, 27, 1971, Box: 1, Page: 115-116. 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/32518 Accessed June 13, 2024.