Udousoro, Imaobong Inyang, and Ekemini Sunday Essien. 2015. “Elemental Composition in Soil Profiles Around an Aluminum Smelting Industry-Alscon in Ikot Abasi, Nigeria, Using XRF Technique”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 23 (2):215-36. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4335.