Author
Escuela Nacional de Minas (Colombia)
2
Universidad Nacional de Colombia. Sede de Medellín. Facultad Nacional de Minas
2
American Institute of Mining and Metallurgical Engineers
1
American Institute of Mining and Metallurgical Engineers. Mining Branch
1
American Institute of Mining, Metallurgical, and Petroleum Engineers
1
Society for Mining, Metallurgy, and Exploration (U.S.)
1
Society of Mining Engineers of AIME
1