[25168] North American, Strata: Lower Ordovician, Period: 22320, Rec 1994

[Rec № 1994] Crossbedding of the Tanglewood Limestone Member of the Lexington Limestone (Ordovician of the Blue Grass Region of Kentucky

Hrabar, S. V., Cressman, E. R. & Potter, P. E.
Masters thesis, Brigham Young University, 1971, « Missing Vol »