Claudia G, Soenhadji IM. Market Overview of Indonesia Copper Export Commodity (Case of Indonesia, Thailand, and Japan Copper Exporting Countries in 2004-2018). jrssem [Internet]. 2021Oct.28 [cited 2024Oct.30];1(3):246-54. Available from: https://jrssem.publikasiindonesia.id/index.php/jrssem/article/view/19