Sintesis dan karakterisasi material sistem nanokomposit BaFe12O19/SrTiO3 melalui proses pemaduan mekanik dan sonikasi daya tinggi = Synthesis and characterization of BaFe12O19/SrTiO3nanocomposite prepared by mechanical alloying and high power ultrasonic destruction processes - Rahmat Doni Widodo, author (2015)