PUSPITASARI, S. Sampul Depan 29 2 2011. Jurnal Penelitian Karet, [S. l.], v. 29, n. 2, p. i-xiii, 2021. DOI: 10.22302/ppk.jpk.v29i2.239. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/239. Acesso em: 3 jul. 2024.