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Hayes, F. 2007. Magnetostratigraphy and paleontology of Wagner Quarry, (late Oligocene, early Arikareean) basal Arikareean Group of the Pine Ridge Region, Dawes County, Nebraska. Bulletin of the Florida Museum of Natural History. 47, 1 (Jun. 2007), 1–48. DOI:https://doi.org/10.58782/flmnh.pfno1183.