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- [2] NIOBRARA FORMATION (UPPER CRETACEOUS), EASTERN NORTH-DAKOTA AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS, 1982, 66 (05): : 622 - 622
- [10] Stratigraphic expression of a regionally extensive impactite within the Upper Cretaceous Fox Hills Formation of southwestern South Dakota SEDIMENTARY RECORD OF METEORITE IMPACTS, 2007, 437 : 199 - 213