“INFLUENCE PRICE RUBBER TO INCOME SIGALANGAN TRADITIONAL MARKET TRADERS, BATANG ANGKOLA DISTRICT, SOUTH TAPANULI REGENCY”, Teknofarm, vol. 1, no. 1, pp. 29–34, Nov. 2025, Accessed: Dec. 01, 2025. [Online]. Available: https://jurnal-alfatah.id/teknofarm/article/view/6