Journal articles: "Aus politik und zeit geschichte" von Hans Herzfeld und Frhr. Hiller von Gaertringen 17. April 1963, Box: 3, Folder: 4. German State Documents, RH MS 228. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/6573 Accessed January 16, 2025.