“Fabrication and Study of the Structural and Spectral Properties of the Composites (y) Mn0.6 Zn0.4 Fe2O4 + (1-Y) PZT Prepared by the Powder Technology Method”. 2019. Tikrit Journal of Pure Science 23 (10): 81-87. https://doi.org/10.25130/tjps.v23i10.568.