GULTOM, Lilis S; SINAGA, Nelly MR. Indonesian Crude Palm Oil (CPO) Exports Through the Gravity Model Approach. Jurnal Penelitian Pendidikan IPA, [S. l.], v. 9, n. 8, p. 6509–6519, 2023. DOI: 10.29303/jppipa.v9i8.4664. Disponível em: https://jppipa.unram.ac.id/index.php/jppipa/article/view/4664. Acesso em: 28 jul. 2024.