National Archives and Records Administration II, RG 59 - Records of the Department of State relating to internal affairs of Poland 1916-1944, Washington 1981 (Mikrofilm-Edition): Doc. 860C.4016. Original in English.
National Archives and Records Administration II: RG 59 - Records of the Department of State relating to internal affairs of Poland 1916-1944, Washington 1981 (Mikrofilm-Edition): Doc. 860C.4016/627. Original in English.