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Furnish |
1966 |
Ammonoids of the Upper Permian Cyclolobus-Zone.
Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 125: 265-296, 4 figs., 2 tabl., Stuttgart
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Miller, Furnish & Clark |
1957 |
Permian ammonoids from Western United States.
Journal of Paleontology, 31 (6): 1057-1068, fig.1-6, pl.133-134; Tulsa,Oklahoma.
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