The Introduction of GSM Services in Anyigba Community and its Impact on Students Expenditure Pattern. Global Journal of Management and Business Research, [S. l.], v. 13, n. 25, p. 73–81, 2013. Disponível em: https://journalofbusiness.org/index.php/GJMBR/article/view/. Acesso em: 18 oct. 2026.