GREBERG, Jenny; SALAMA, Abubakary. Analysis of the Current Challenges for Deep Underground Mines: Labour Productivity Improvement. Tanzania Journal of Engineering and Technology, [S. l.], v. 39, n. 1, 2020. Disponível em: https://journals.udsm.ac.tz/index.php/tjet/article/view/3577. Acesso em: 24 nov. 2024.