. . "Testimony (by questionnaire) of an unknown witness submitted to the Jewish Historical Committee in Bialystok regarding an\"Aktio\" in the Bialystok Ghetto, 05-12 February 1943"@eng . "Testimony (by questionnaire) of an unknown witness submitted to the Jewish Historical Committee in Bialystok regarding an\"Aktio\" in the Bialystok Ghetto, 05-12 February 1943"@eng . .