TY  - RPRT
TI  - The Belt series in Montana, with a geologic map and a section on paleontologic criteria
AU  - Clyde Polhemus Ross
AU  - B.A.L. Skipp
AU  - Richard Rezak
PY  - 1963
DO  - 10.3133/pp346
UR  - https://pubs.usgs.gov/publication/pp346
ID  - pp346
ER  -