admin, admin, et al. “Structural Properties of the Composites (BaFe12O19 Ni0.3Cu0.2Zn0.5Al-0.5Fe1.5O4) Prepared by Sol-Gel Auto Combustion”. Tikrit Journal of Pure Science, vol. 24, no. 4, Aug. 2019, pp. 69-73, doi:10.25130/tjps.v24i4.402.