Zeller, E. J. (1950). Stratigraphic significance of Mississippian endothyroid foraminifera. University of Kansas, Paleontological Contributions, Protozoa. 4: 1-23.
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Zeller, E. J.
1950
Stratigraphic significance of Mississippian endothyroid foraminifera.
University of Kansas, Paleontological Contributions, Protozoa