W. A. Iyama, M. N. Timothy, C. O. Egbunefu, W. S. Emejuru, F. Samuel-Harry, and O. S. Edori, “Comparative Assessment of Soil Fertility Status of Aged and Abandoned Rumuolumeni Dumpsite, Port Harcourt, Nigeria”, EJAS, vol. 10, no. 6, pp. 266–278, Dec. 2022.