WRIGHT , Robert P. Organic-walled Microplankton in the Subsurface Ordovician of Northeastern Kansas. Bulletin (Kansas Geological Survey), [S. l.], p. 1–53, 1981. DOI: 10.17161/kgsbulletin.no.23608. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/23608. Acesso em: 6 apr. 2025.