Japan Center for Asia Historical Materials (JACAR), Shogaikoku naisei kankei zasan: ‘Surobakia’ no bu [Miscellaneous Documents concerning domestic affairs of various countries: Slovakia], JACAR B02021596400, 137. Original in Japanese.
National Archives and Records Administration II, Records of the Department of State relating to internal affairs of Czechoslovakia 1910-1944, Washington 1982 (Mikrofilm-Edition), Doc. 860F.4016/68, p. 1-3. Original in English.