Nainggolan, Indra Veri, and Ester Mawar Siagian. 2020. “The Analysis of Proper Raw Material Inventory Control to Increase Sales Results in the Home Industry of Sihobuk Martabe Tarutung Beans”. Jurnal Mantik 4 (3):1831-36. https://doi.org/10.35335/mantik.Vol4.2020.1018.pp1831-1836.