Mohammad, L.A. 2017. Preparation and Characterization of tetra dentate Schiff- base ligand with some its complexes derived from thiosemicarbazone and β-[P-(2-pyrimidyl Sulhamyl) phenyl azo)] Ketonilide (SDPA). Al-Qadisiyah Journal of Pure Science. 18, 4 (Jul. 2017), 196-208.