HOCHMAIR, H.; BENJAMIN, A. An Introduction to USGS Topo Maps: FOR363/FR432, 1/2021. EDIS, Gainesville, FL, v. 2021, n. 1, p. 7, 2021. DOI: 10.32473/edis-fr432-2021. Disponível em: https://journals.flvc.org/edis/article/view/122288. Acesso em: 20 apr. 2024.