“Extraction of Zn (II) and Cu (II) Ions Using PEG (300) - KCl Salt Aqueous Two-Phase Systems” (2011) Al-Khwarizmi Engineering Journal, 7(2), pp. 68–74. Available at: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/49 (Accessed: 22 November 2024).