PUSPITASARI, S. Sampul Belakang 37 1 2019. Jurnal Penelitian Karet, [S. l.], v. 37, n. 1, p. xvii - xxii, 2021. DOI: 10.22302/ppk.jpk.v37i1.633. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/633. Acesso em: 22 nov. 2024.