Wijayanto, Arip, Nurmadina, Darwitono, and Titik Wisnu Wardhana. “Productivity and Comparison of Resin Production from Pinus Merkusii Jungh Et De Vriese Against NPS Determined by Perum Perhutani”. Jurnal Silva Tropika 3, no. 2 (January 15, 2020): 199-205. Accessed January 31, 2025. https://online-journal.unja.ac.id/STP/article/view/8151.