H.Buttrus, N., نبیل, A.Saeed, I. and اسراء 2005. Synthesis and Characterization of New Complex Salts of some Transition Metals with Pyrrolium Salts. Journal of Education and Science (JES). 17, 1 (Jan. 2005), 1–9. DOI:https://doi.org/10.33899/edusj.2005.80954.