Ameh, G. I., and Ezinne Jennifer Okenwa. 2021. “Assessment of Seasonal Variation on Heavy Metal Concentration in the Soil of Ugwuaji Solid Waste Dump Sites”. Asian Journal of Biotechnology and Genetic Engineering 4 (2), 28-35. https://journalajbge.com/index.php/AJBGE/article/view/30098.