Auteur
"• Refinadora Plata Guanaceví, S.A. de C.V., (Guanacevi mine in Durango, Mexico) • Mina Bolañitos S.A de C.V., (Bolañitos mine in Guanajuato, Mexico) • Terronera Precious Metals S.A. de C.V. (The Terronera development project located in Jalisco, Mexico) • Minera Plata Adelante, S.A. de C.V. (Exploration office in Durango, Mexico) • Minera Pitarrilla S.A. de C.V. (Exploration office in Durango, Mexico)"