PUSPITASARI, S. Sampul Depan 31 1 2013. Jurnal Penelitian Karet, [S. l.], v. 31, n. 1, p. i-xii, 2013. DOI: 10.22302/ppk.jpk.v31i1.200. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/200. Acesso em: 4 apr. 2025.