Raymond C. Douglass

• Fusulinid biostratigraphy and correlations between the Appalachian and eastern interior basins
• Introducción al estudio de los microfósiles
• Late Paleozoic Foraminifera from southern Chile
• Pennsylvanian fusulinids from southeastern Alaska
• Permian Tethyan fusulinids from California
• The foraminiferal genus Orbitolina in North America