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New and little-known ammonites from the upper cretaceous (Cenomanian and Turonian) of the Western Interior of the United States / by William A. Cobban.

By: Cobban, William Aubrey, 1916-2015.
Material type: materialTypeLabelBookSeries: Geological Survey Professional Paper; 699.Publisher: Washington : United States Government Printing Office, 1971Description: 24 p., [18] h. de lam. --.Content type: Texto (visual) Media type: sin mediación Subject(s): Amonites | Cretácico | Estados Unidos
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