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Ammonites from the upper part of the Pierre Shale and Fox Hills Formation of Colorado

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By: Landman, Neil H. - Cobban, William Aubrey,

Publication info: New York, NY American Museum of Natural History c2003

Holding Institution: American Museum of Natural History Library

Subjects: Ammonoidea Colorado Cretaceous Fox Hills Formation Mollusks, Fossil Paleontology Pierre Shale