Romanus Udegbunam Ayadiuno, Dominic Chukwuka Ndulue, Arinze Tagbo Mozie, Phil O. Phil-Eze. 2020. “Geomorphological Analysis and Terrain Characterization of the Du and Anambra Rivers System of Southeastern Nigeria”. PalArch’s Journal of Archaeology of Egypt / Egyptology 17 (9):7704 -19. https://archives.palarch.nl/index.php/jae/article/view/5574.