The next peace congress and the Polish question : Poles, Ruthenians and Lithuanians, with ethnographical map of the Slav race : supplement to "The Polish Question" = Le prochain congrès de la paix et la question polonaise - Lipkowski, Józef (1863-1949). (Paris : Dépot principal a la rédaction de la revue Polonia, 1915)
Keywords: Kwestia polska (1795-1918).; Wojna światowa (1914-1918) -- pokój