HARBAUGH, John W.; MERRIAM, Daniel F.; HOWARD, Hugh H. Reconstructing Late Cenozoic Stream Gradients from High-Level Chert Gravels in Central Eastern Kansas. Current Research in Earth Sciences, [S. l.], n. 253, p. 1–26, 2007. DOI: 10.17161/cres.v0i253.11810. Disponível em: https://journals.ku.edu/cres/article/view/11810. Acesso em: 9 apr. 2025.