EVALUATION OF THE ROLE OF SINGLE WINDOW IN FACILITATING THE PROCESS OF GOODS IMPORT IN CUSTOMS OF QAZVIN PROVINCE. Singaporean Journal of Business Economics and Management, [S. l.], v. 3, n. (1), p. 84–93, 2014. Disponível em: https://www.singaporeanjbem.com/index.php/SJBEM/article/view/111. Acesso em: 16 jul. 2026.