“The Gymnaestrada in Zagreb ( July 10th-14th) and the Congress for Physical Education (July 14th-17th, 1957)”. Fiep Bulletin - online 57, no. 5-6 (agosto 17, 2015). Acessado novembro 24, 2024. https://ojs.fiepbulletin.net/fiepbulletin/article/view/5407.