TY  - RPRT
TI  - Geologic map of Montana
AU  - Clyde P. Ross
AU  - David A. Andrews
AU  - Irving J. Witkind
PY  - 1955
DO  - 10.3133/70210885
UR  - https://pubs.usgs.gov/publication/70210885
ID  - 70210885
ER  -