Stratigraphy & Sedimentology of the Upper Hell Creek, Formation,
Clay C. Garretson and Joseph Hatcher,
Geological Society of America Abstracts With Programs Volume 36(5), pp. 60, 2004.
Kristen E. Newman and Joseph Hatcher, Geological Society of America Abstracts
2004
Comparison of Anthill Microfossils Between the Upper Hell Creek Formation and the Tullock Member of the Fort Union Formation of Eastern Montana,
With Programs Volume 36(5), pp.366, 2004.
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