Suri, Tasha Ningtyas, Rahmanta, and Rulianda Purnomo Wibowo. “Analysis of Affecting Factors on the Natural Rubber Exports Volume in North Sumatera”. Indonesian Journal of Agricultural Research 4, no. 1 (April 21, 2021): 58 - 64. Accessed November 25, 2024. https://talenta.usu.ac.id/InJAR/article/view/4584.