National Archives and Records Administration II, RG 59 - Records of the Department of State relating to internal affairs of 1910-1944, Washington 1982 (Microfilm-Edition): Dokument 874.4016/69, p. 1f. Original in English.
National Archives and Records Administration II - Records of the Department of State relating to internal affairs of Hungary 1930-1944, Washington, Washington, Del. 1983 (Microfilm-Edition): Doc. 864.4016/151. Original in English.