Basic sanitation: Conceptions and perceptions of Middle School students in Porto Alegre Metropolitan Area. Research, Society and Development, [S. l.], v. 10, n. 5, p. e42110514815, 2021. DOI: 10.33448/rsd-v10i5.14815. Disponível em: https://www.rsdjournal.org/rsd/article/view/14815. Acesso em: 5 dec. 2025.