TY  - RPRT
TI  - Type sections and stratigraphy of the members of the Blackleaf and Marias River formations (Cretaceous) of the Sweetgrass arch, Montana
AU  - William Aubrey Cobban
AU  - C. E. Erdmann
AU  - R. W. Lemke
AU  - E. K. Maughan
PY  - 1976
DO  - 10.3133/pp974
UR  - https://pubs.usgs.gov/publication/pp974
ID  - pp974
ER  -