Orji, A.; Onoh, E. M.; Anthony-Orji, O. I.; Ogbuabor, J. E.; Okoro, O.; Akpesue, J. F. Tourism, Migration, And Productive Capacity Growth In Sub-Saharan Africa. IEF 2025, 28 (2), 31-40. https://doi.org/10.36923/ie-frontiers.v28i2.406.