Fenty Maimunah Simbolon, Noverina Chaniago, and Joni Pranata Ginting. “RESPONSE OF FROM OIL PALM EMPTY FRUITS AND EM-4 COMPOSTING ON TOP SOIL MEDIA TO VEGETATIVE GROWTH OF COCOA ( Theobroma Cacao L.)”. International Journal of Educational Research Excellence (IJERE) (June 30, 2020): 39–45. Accessed July 3, 2024. https://ejournal.ipinternasional.com/index.php/ijere/article/view/657.