“The Physical and Geochemical Investigation of Effurun River Sand at Ugbolokposo and Ugbomro, Uvwie-Aladja, western Niger Delta, Nigeria”, AJAS, vol. 4, no. 6, Jan. 2017, Accessed: Dec. 26, 2025. [Online]. Available: https://www.ajouronline.com/index.php/AJAS/article/view/4278