Pietrzak M, Iskra J, Dziadek B, Gwiazdoń P. AN ANALYSIS OF SPORTS CAREER DEVELOPMENT IN THE 400-METRE DASH. JPEH [Internet]. 2021Dec.31 [cited 2024Oct.22];10(18):43-51. Available from: https://jpeh.po.edu.pl/index.php/jpeh/article/view/52