Approaches to the Assessment of the Contribution of Tourism Into the Regional Surplus Product: Case of the Kaliningrad Region. Mediterranean Journal of Social Sciences, [S. l.], v. 6, n. 3 S5, p. 275, 2015. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/6781.. Acesso em: 5 may. 2024.