ANALYSIS OF MINING ORE CONCENTRATES WITH A LOW COST PORTABLE LIBS SYSTEM. Revista Investigación & Desarrollo, [S. l.], v. 18, n. 1, 2018. Disponível em: https://www1.upb.edu/revista-investigacion-desarrollo/index.php/id/article/view/171. Acesso em: 19 apr. 2025.