TY  - RPRT
TI  - Thickness of Upper Cretaceous rocks from the top of the Niobrara Formation to the base of the Fox Hills Sandstone, Powder River basin, Wyoming and Montana
AU  - J. E. Fox
AU  - Debra K. Higley
PY  - 1987
DO  - 10.3133/ofr87340a
UR  - https://pubs.usgs.gov/publication/ofr87340A
ID  - ofr87340A
ER  -