Khalifa, K., Hamil, A., & Aluwah, A. (2018). Complex Formation of Cr3+, Mn2+, Ni2+ and Cu2+ ions using 1-((2E,3E)-3-(Hydroxyimino)Butan-2-Ylidene)Urea. Journal of Pure & Applied Sciences , 17(2), 31-38. https://doi.org/10.51984/jopas.v17i2.149