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New and Little-known Ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the Western Interior of the United States
William Aubrey Cobban
出版U.S. Government Printing Office, 1971
URLhttp://books.google.com.hk/books?id=cb5feAr4u_YC&hl=&source=gbs_api
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註釋A species each of Anisoceras, Desmoceras, Tragodesmoceras, Calycoceras, Nigericeras, and Paracompsoceras (new genus) is described and illustrated.