TY  - RPRT
TI  - A USGS Zonal Table for the Upper Cretaceous Middle Cenomanian--Maastrichtian of the Western Interior of the United States Based on Ammonites, Inoceramids, and Radiometric Ages
AU  - William A. Cobban
AU  - Ireneusz Walaszczyk
AU  - John D. Obradovich
AU  - Kevin C. McKinney
PY  - 2006
DO  - 10.3133/ofr20061250
UR  - https://pubs.usgs.gov/publication/ofr20061250
ID  - ofr20061250
ER  -