“The Gymnaestrada in Zagreb ( July 10th-14th) and the Congress for Physical education (July 14th-17th, 1957)” (2015) Fiep Bulletin - online, 57(5-6). Disponível em: https://ojs.fiepbulletin.net/fiepbulletin/article/view/5407 (Acessado: 25 abril 2025).