Situmorang Y, Saragih AD, Tanjung WS, Purba IMH, Tanjung F. Deli Maatschappij Di Sumatera Timur Sebelum Krisis Ekonomi Dunia Tahun 1869-1930. Innovative [Internet]. 2024 Apr. 9 [cited 2026 Oct. 14];4(2):6689-9. Available from: https://j-innovative.org/index.php/Innovative/article/view/10070