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. EiS. 2016;59(4):15. Accessed November 22, 2024. https://ekonomiaisrodowisko.pl/journal/article/view/215