15/01/2021
04/01/2021
30/12/2020
23/12/2020
18/12/2020
03/11/2020
27/10/2020
21/10/2020
09/10/2020
02/10/2020
14/09/2020
08/09/2020
30/08/2020
27/08/2020
25/08/2020
17/08/2020
Instituto de Ingenieros de Minas del Perú (IIMP)
15/01/2021
04/01/2021
30/12/2020
23/12/2020
18/12/2020
03/11/2020
27/10/2020
21/10/2020
09/10/2020
02/10/2020
14/09/2020
08/09/2020
30/08/2020
27/08/2020
25/08/2020
17/08/2020