Nasution AS, Suhardi AA, Andini I, Efendi S, Wulandari S. Development of Farmer Exchange Rates by Sub-Sector in North Sumatra. j.ekonomi, j.manajemen, j.bisnis, j.akuntansi [Internet]. 2002 Dec. 31 [cited 2026 Jun. 3];2(2):527–532. Available from: https://penerbitadm.pubmedia.id/index.php/JER/article/view/1098