Nze IC, Ogwude IC, Nnadi KU, Ibe CC. Modelling the Relationship between Demand for River Port Services and Vessel Supply Costs: Empirical Evidence from Nigeria. gjss [Internet]. 2016 Oct. 29 [cited 2024 Jul. 3];2(3):144-9. Available from: https://onlinesciencepublishing.com/index.php/gjss/article/view/498