TY  - RPRT
TI  - Measured stratigraphic sections of Lower Cretaceous Blackleaf Formation and lower Upper Cretaceous Frontier Formation (lower part) in Beaverhead and Madison counties, Montana
AU  - T. S. Dyman
PY  - 1985
DO  - 10.3133/ofr85431
UR  - https://pubs.usgs.gov/publication/ofr85431
ID  - ofr85431
ER  -