Armando Valenzuela was the executive secretary of the First International Meeting on Mining and Sustainable Development "Impurities: Regulatory Trends, Markets and Technologies" held on April 6, 2017 in the framework of CESCO week.
Armando Valenzuela was the executive secretary of the First International Meeting on Mining and Sustainable Development "Impurities: Regulatory Trends, Markets and Technologies" held on April 6, 2017 in the framework of CESCO week.