COLLINS, Jack B. Subsurface Geologic Cross Section from Trego County, Kansas, to Cheyenne County, Colorado. Bulletin (Kansas Geological Survey), [S. l.], p. 1–8, 1947. DOI: 10.17161/kgsbulletin.no.23577. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/23577. Acesso em: 13 apr. 2025.