Internal report from Chief of the 5th Red Army Directorate I. Proskurov to Soviet People’s Commissar of Defence K. Voroshilov with attached materials about anti-Soviet activities in the Baltic countries and the recruitment of Estonian volunteers for fighting in Finland

27 January 1940
Russian State Military Archive
Coll. 33987, ser. 3а, fold. 1306, ff. 50–58.

Report – original, attachment – certified copy