Situmorang H, Winandi R, Nuryartono N. Economic Efficiency of Maize at Dairi District North Sumatra Province. JACE [Internet]. 2020 Sep. 23 [cited 2025 Aug. 3];3(2):83-91. Available from: http://jurnalpolitanipyk.ac.id/index.php/JACE/article/view/216