CLAY, Dean. The Sierra Club: Environmental Activism and US Empire, 1892–1900. USAbroad – Journal of American History and Politics, [S. l.], v. 7, n. 1, p. 1–13, 2024. DOI: 10.6092/issn.2611-2752/18240. Disponível em: https://usabroad.unibo.it/article/view/18240. Acesso em: 19 dec. 2024.