Cobban, W. A., & Scott, G. R. (1964). Multinodose scaphitid cephalopods from the lower part of the Pierre Shale and equivalent rocks in the conterminous United States: Three species of ammonites, assigned to the news genus Trachyscaphites, provide a means for the correlation of Upper Cretaceous strata between the Western Interior, the Gulf Coastal Plain, and Europe. United States Government Print. Office.
Chicago-Zitierstil (17. Ausg.)Cobban, William A., und Glenn R. Scott. Multinodose Scaphitid Cephalopods from the Lower Part of the Pierre Shale and Equivalent Rocks in the Conterminous United States: Three Species of Ammonites, Assigned to the News Genus Trachyscaphites, Provide a Means for the Correlation of Upper Cretaceous Strata Between the Western Interior, the Gulf Coastal Plain, and Europe. Washington, DC: United States Government Print. Office, 1964.
MLA-Zitierstil (9. Ausg.)Cobban, William A., und Glenn R. Scott. Multinodose Scaphitid Cephalopods from the Lower Part of the Pierre Shale and Equivalent Rocks in the Conterminous United States: Three Species of Ammonites, Assigned to the News Genus Trachyscaphites, Provide a Means for the Correlation of Upper Cretaceous Strata Between the Western Interior, the Gulf Coastal Plain, and Europe. United States Government Print. Office, 1964.