National Archives and Records Administration II, RG 59 - Records of the U. S. Department of State relating to internal affairs of Romania 1910-1944, Wilmington, Del. 1981 (Microfilm), Doc. 871.4016/303. Original in English.
Archivio Storico Diplomatico del Ministero degli Affari Esteri, AG Uff IV, Posizione S.E. 27.869, busta A-B, fasc. Boemia e Moravia. Original in Italian.