Cenozoic Volcanism in the Southern Rocky Mountains UpdatedRudy C. Epis · First published 1988Open the Tome
Western slope Colorado, Western Colorado and Eastern UtahRudy C. Epis, J. F. Callender · First published 1981Open the Tome
Stratigraphic nomenclature of the Thirtynine Mile volcanic field, central ColoradoRudy C. Epis · First published 1974Open the Tome
