Message from Soviet People’s Commissar of Internal Affairs L. Beria to Soviet People’s Commissar of Defence K. Voroshilov with the remarks of the Finnish military attaché in the USSR K. Somerto about the reception of the Finnish delegation in the Kremlin, mobilisation in Finland, and German policies
14 October 1939
Russian State Military Archive
Coll. 33987, ser. 3а, fold. 1240, ff. 83–86.