“Peramalan Kebutuhan Mangan Domestik Menggunakan Model Time Series Dan Analisis Dampak Ekonomi Sektor Pertambangan Mangan Terhadap Perekonomian Nasional”. Jurnal Geomine 8, no. 01 (April 30, 2020): 25–31. Accessed June 28, 2025. https://jurnal.fti.umi.ac.id/index.php/JG/article/view/1388.