PUSPITASARI, S. Sampul Belakang 33 1 2015. Jurnal Penelitian Karet, [S. l.], v. 33, n. 1, p. i-iv, 2015. DOI: 10.22302/ppk.jpk.v33i1.209. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/209. Acesso em: 3 jul. 2024.