@article{Sacewicz_2019, title={Concepts of the Political and Military Position of the Polish Underground State in Response to the Red Army’s Invasion of the Eastern Territories of the Second Republic of Poland (1943-1944) - a Broad Outline}, url={https://czasopisma.uwm.edu.pl/index.php/ep/article/view/3342}, DOI={10.31648/ep.3342}, number={XII}, journal={Echa Przeszłości}, author={Sacewicz, Karol}, year={2019}, month={mar.} }