“Zygmunt Rybicki: Rady delegatów robotniczych w Polsce 1918-1919, Warszawa 1962, PWN” (1963) Contemporary Central & East European Law, (2), pp. 17–18. Available at: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1645 (Accessed: 8 October 2025).