Basheer, Hassan M., Fathil Jasim, and Mohammed A. Al- Hammed. 2013. “Derivative Zero - Crossing Spectrophotometry Of Binary Mixtures Of Acetyl Acetonates Of Micro – Amounts Of Mn (Ii) And Al (Iii)”. Baghdad Science Journal 10 (3). Iraq, Baghdad:866-82. https://doi.org/10.21123/bsj.2013.10.3.866-882.