OKPIN, Fidelis Oko. Integrating Urban Sustainability Education into the Curricula of Tertiary Institutions in Calabar Metropolis: Challenges and Opportunities. Transdisciplinary Journal of Education & Sustainable Development Studies, [S. l.], v. 1, n. 2, p. 102–115, 2025. DOI: 10.60787/tjesds.vol1no2.22. Disponível em: https://tjesds.org.ng/index.php/home/article/view/22. Acesso em: 14 apr. 2026.