Alternative Automobile Pollution Control Policies: Perspective of Motorists in Owerri Municipal of Imo State, Nigeria. Journal of Educational and Social Research, London, U.K., v. 3, n. 4, p. 9, 2013. Disponível em: https://www.richtmann.org/journal/index.php/jesr/article/view/418.. Acesso em: 5 may. 2024.