MAHMOUD, H. . . The Level of Psychological hardness of A Sample of Swimming Players in Damascus Governorate. Tishreen University Journal- Arts and Humanities Sciences Series, [S. l.], v. 39, n. 4, 2017. Disponível em: https://journal.tishreen.edu.sy/index.php/humlitr/article/view/3119. Acesso em: 2 may. 2024.