* Son to Dimitrov, 19 April 1943, Archive of the Secretariat of the Executive Committee of the Communist International: coded correspondence with Communist Parties (1933–1943). RTsKhIDNI 495–184–5 (1942 file). | * Son to Dimitrov, 19 April 1943, Archive of the Secretariat of the Executive Committee of the Communist International: coded correspondence with Communist Parties (1933–1943). RTsKhIDNI 495–184–5 (1942 file). |