Hajduk-Stelmachowicz, Marzena, Katarzyna Cecuła, Paulina Bełch, and Elżbieta Szczygieł. “The Impact of the COVID-19 Pandemic on the Functioning of Selected Aero Clubs – a Preliminary Study”. Studies of the Industrial Geography Commission of the Polish Geographical Society 37, no. 2 (June 29, 2023): 64–83. Accessed October 31, 2024. https://prace-kgp.uken.krakow.pl/article/view/9766.