“ANALYSIS OF PALM OIL FARMING AND PALM SUGAR ADDED VALUE AS AS HERBAL MEDICINE (CASE: KARO REGENCY, NORTH SUMATRA PROVINCE)”. Journal of Pharmaceutical Negative Results (December 24, 2022): 4159–4168. Accessed July 1, 2026. https://www.pnrjournal.com/index.php/home/article/view/5297.