Herman K, Sugiono JP. Studi Pengukuran Kekerasan Benda dengan Analisa Spektral. JID [Internet]. 2023 Apr. 30 [cited 2025 Aug. 3];1(2):65-74. Available from: https://ejournal.itbwigalumajang.ac.id/index.php/jid/article/view/1091