Soedewo, Ery, and Nur Ahmad. “ABBASID COINS IN NORTH SUMATRA: EVIDENCE OF INTERACTIONS WITH ISLAMIC CIVILIZATION IN THE 8TH – 9TH CENTURY A.D”. AMERTA 40, no. 1 (June 26, 2022): 73–86. Accessed November 22, 2024. https://ejournal.brin.go.id/amerta/article/view/21.