Sudarti, Sudarti, Yuli Hariyati, Ariza Budi Tanjung Sari, Sumardi Sumardi, and Wahyu Muldayani. 2022. “Fermentation Process of Dry Cocoa Beans through Extremely Low Frequency (ELF) Magnetic Field Exposure”. Jurnal Penelitian Pendidikan IPA 8 (2):584-91. https://doi.org/10.29303/jppipa.v8i2.1356.