"GEOCHEMICAL PROXIES FROM CLAYS IN PARTS OF NORTHERN NIGER DELTA: IMPLICATION FOR UNRAVELLING PALEOWEATHERING AND PALEO-REDOX CONDITIONS" (2020) FULafia Journal of Science and Technology, 6(1), ص 6–14. موجود في: https://lafiascijournals.org.ng/index.php/fjst/article/view/161 (تاريخ الوصول: 17 مايو 2026).