BAARS, D. L.; ROSS, Charles A.; RITTER, Scott M.; MAPLES, C. G. Proposed Repositioning of the Pennsylvanian-Permian Boundary in Kansas. Bulletin (Kansas Geological Survey), [S. l.], n. 230, p. 5–10, 2024. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/20480.. Acesso em: 3 jul. 2024.