Orbitoid foraminifera of the genus Orthophragmina from Georgia and Florida - Cooke, C. Wythe (Charles Wythe), 1887-1971; Cushman, Joseph A. (Joseph Augustine), 1881-1949 (Washington : Government Printing Office, 1917)
Keywords: fosilní dírkonošci; fossil foraminifers; separáty; offprints