Ely Brand, Fifian Permata Sari, and Yetty Oktarina. 2022. “THE STRATEGY TO INCREASE ROBUSTA COFFEE PRODUCTION AT OGANKOMERING ULU REGENCY OF SOUTH SUMATRA PROVINCE”. International Journal of Social Science 2 (1):1095-1102. https://doi.org/10.53625/ijss.v2i1.2305.