Muhammed Abdel Hasan Shallal 2023. Design of Methodologies for the Determination of Selenium and Mercury in Samples of Environmental Interest by Solid Phase Spectrophotometry. Journal of Population Therapeutics and Clinical Pharmacology. 30, 3 (Mar. 2023), 373–384. DOI:https://doi.org/10.47750/jptcp.2023.30.03.039.