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3. The Late Cretaceous Bearpaw Formation in the south Saskatchewan River valley;Caldwell,1968
4. The evolutionary diversity of barnacles, with an updated classification of fossil and living forms;Chan;Zoological Journal of the Linnean Society,2021
5. A USGS zonal table for the Upper Cretaceous Middle Cenomanian-Maastrichtian of the Western Interior of the United States, based on ammonites, inoceramids and radiometric ages;Cobban,2006