NURWATI, NIKEN, and ANTO ARIYANTO. “PERAN SUB-SEKTOR PERKEBUNAN PADA PEREKONOMIAN KABUPATEN INDRAGIRI HILIR PROPINSI RIAU”. Jurnal Ilmiah Pertanian 4, no. 2 (February 1, 2008): 18-23. Accessed May 16, 2024. https://journal.unilak.ac.id/index.php/jip/article/view/1346.