Walczak H. At the roots of the Second Polish Republic’s diplomacy. The creation, development and functioning of the foreign ministry of the Regency Kingdom of Poland in the years 1917-1918. Res Gestae [Internet]. 2023 Jul. 15 [cited 2026 Nov. 15];16:73-91. Available from: https://resgestae.uken.krakow.pl/article/view/10137