Dafisco, R., Wulandari, S. and Arifin, N.F. 2025. Gambir, Timber and Coffee: A History of the Trade in Forest and Plantation Products on the East Coast of Sumatra in the 19th Century. Journal of Philology and Historical Review. 2, 2 (Apr. 2025), 151–163. DOI:https://doi.org/10.61540/jphr.v2i2.99.