Galloway, J. J.; Harlton, B. H. (1928). Some Pennsylvanian Foraminifera of Oklahoma with special reference to the genus Orobias. Journal of Paleontology. 2: 338-357.
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Galloway, J. J.; Harlton, B. H.
1928
Some Pennsylvanian Foraminifera of Oklahoma with special reference to the genus Orobias