IrawanWien Setya Budhi, Endang Suhendang, and MatangaranJuang Rata. “Model Penduga Produksi Kopal”. Jurnal Manajemen Hutan Tropika 13, no. 3 (1): 166-171. Accessed December 3, 2024. https://journal.ipb.ac.id/index.php/jmht/article/view/4004.