Purwaningrum, Yayuk, Yenni Asbur, Dedi Kusbiantoro, and Khairunisyah. “Effect of Length and Up Ward Tapping on Physiology and Latex Yield on Rubber Plants RRIM 921”. Jurnal Online Pertanian Tropik 8, no. 1 (May 1, 2021): 59-66. Accessed November 22, 2024. https://talenta.usu.ac.id/jpt/article/view/6311.