MUHAMMAD GHOUS; SAIMA SIDDIQUI. Assessment of Willingness to Pay for Sustainable Ecotourism Development in the Salt Range Wetlands, Punjab Pakistan. International Journal of Economic and Environmental Geology, [S. l.], v. 13, n. 2, p. 47–51, 2022. DOI: 10.46660/ijeeg.v13i2.554. Disponível em: https://econ-environ-geol.org/index.php/ojs/article/view/554. Acesso em: 6 oct. 2025.