Adnyana, I. G. A. P.; Sukarasa, I. K.; Suarbawa, K. N. Synthesis and Characterization of Permanent Magnetic Oxide System Ba1-X-yLaxCeyFe12O19 System Doped With La-Ce Metal Using Wet Mechanical Milling Method. Int. j. chem. mater. sci. 2021, 4, 43-48.