Abd Al-Kareem, R.N., Mohammed, Y.I. and Himdan, T.A.H. (2018) “Refractive Index and Density of Urea dissolved in Ammonium phosphate’s Solution at Different Temperature”, Al-Nahrain Journal of Science, 14(4), pp. 18–24. Available at: https://anjs.edu.iq/index.php/anjs/article/view/751 (Accessed: 22 May 2026).