Somogyvári, Lajos. “„We Know, That the First of May Is an Important issue…”: Visual Propaganda in the 1950’s and 1960’s”. Per Aspera ad Astra 6, no. 1 (September 2, 2019): 99–120. Accessed December 5, 2025. https://journals.lib.pte.hu/index.php/paaa/article/view/3817.