IDENTIFYING KEY CHALLENGES AND ISSUES IN CROWD MANAGEMENT DURING HAJJ EVENT IN SAUDI ARABIA. The Journal of Modern Project Management, [S. l.], v. 10, n. 2, p. 358–373, 2023. Disponível em: https://journalmodernpm.com/manuscript/index.php/jmpm/article/view/560. Acesso em: 16 apr. 2026.