Santamaría Herrera, Francisco José. “Pneumoconiosis in Coal Miners in Two Companies Affiliated to the Instituto De Seguros Sociales, Seccional Valle Del Cauca”. Colombia Medica 23, no. 2 (June 30, 1992): 79–85. Accessed November 24, 2024. https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6344.