Rahmat, S. et al. 2024. Characterization of Strontium Ferrite Based on Natural Iron Sand at Banjar Beach with Co and Zn Ion Doping as Generator Material Electricity . Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal). 5, 4 (Oct. 2024), 739–743. DOI:https://doi.org/10.29303/goescienceed.v5i4.353.