08/09/2020
30/08/2020
27/08/2020
25/08/2020
17/08/2020
11/08/2020
03/08/2020
27/07/2020
25/05/2020
27/02/2020
13/12/2019
14/10/2019
16/08/2019
03/07/2019
10/06/2019
30/05/2019
Instituto de Ingenieros de Minas del Perú (IIMP)
08/09/2020
30/08/2020
27/08/2020
25/08/2020
17/08/2020
11/08/2020
03/08/2020
27/07/2020
25/05/2020
27/02/2020
13/12/2019
14/10/2019
16/08/2019
03/07/2019
10/06/2019
30/05/2019