National Geologic Map Database
General Information
- Title: Observations on the Cenomanian (Upper Cretaceous) ammonite Calycoceras (Calycoceras) obrieni Young, 1957, from Arizona and New Mexico
- Author(s): Cobban, W.A., and Kennedy, W.J.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Bulletin 1881-C [p. C1-C4]
- Larger Work: Sando, W.J., ed., Shorter contributions to paleontology and stratigraphy
- Publication Date: 1989
- Cross Section: None
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