Łach, H. 2021. Establishing the Polish-Soviet border. On the hundredth anniversary of the delimitation of the Riga border: Establishing the Polish-Soviet border. On the hundredth anniversary of the delimitation of the Riga border. Przegląd Wschodnioeuropejski. 12, 2 (Dec. 2021), 91–106. DOI:https://doi.org/10.31648/pw.6865.