Professional organizations of Bulgarian engineers during the interwar period. Research Announcements "Heritage BG", [S. l.], n. 8, p. 80–87, 2025. DOI: 10.58894/AR-HBg.2025.8.80-87. Disponível em: https://periodicals.uni-sofia.bg/index.php/AR-NBg/article/view/3563. Acesso em: 10 mar. 2026.