AMREVURAYIRE, E. O., and V. N. OJEH. “CONSEQUENCES OF RURAL-URBAN MIGRATION ON THE SOURCE REGION OF UGHIEVWEN CLAN DELTA STATE NIGERIA”. European Journal of Geography, vol. 7, no. 3, Apr. 2016, pp. 42-57, https://eurogeojournal.eu/index.php/egj/article/view/389.