KULCZYK, S.; DEREK, M.; WOŹNIAK, E. HOW MUCH IS THE “WONDER OF NATURE” WORTH? THE VALUATION OF TOURISM IN THE GREAT MASURIAN LAKES USING TRAVEL COST METHOD. Economics and Environment, [S. l.], v. 59, n. 4, p. 15, 2016. Disponível em: https://www.ekonomiaisrodowisko.pl/journal/article/view/215. Acesso em: 9 may. 2024.