PUSPITASARI, S. Sampul Depan 30 1 2012. Jurnal Penelitian Karet, [S. l.], v. 30, n. 1, p. i-xii, 2012. DOI: 10.22302/ppk.jpk.v30i1.196. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/196. Acesso em: 3 jul. 2024.