TY  - RPRT
TI  - Thickness of Upper Cretaceous rocks from the base of the Ardmore Bentonite to the base of the Clay Spur Bentonite (top of the Lower Cretaceous rocks), Powder River basin, Wyoming and Montana
AU  - J. E. Fox
AU  - Debra K. Higley
PY  - 1987
DO  - 10.3133/ofr87340f
UR  - https://pubs.usgs.gov/publication/ofr87340F
ID  - ofr87340F
ER  -