A., Abdel Fattah, N., Sadeek A. S., Ali, B. H., Abdo, A. A., and Weheish, H. L. “Spectrophotometric Determination of Praseodymium by 1,4- Dihydroxyanthraquinone After Its Selective Separation from Rosetta Monazite Rare Earth Concentrate by Solvent Extraction”. The International Journal of Science & Technoledge 4, no. 5 (May 31, 2016). Accessed July 17, 2024. http://internationaljournalcorner.com/index.php/theijst/article/view/123851.