TY  - RPRT
TI  - Geologic map of the Roberts Mountain quadrangle, Lewis and Clark County, Montana
AU  - Robert George Schmidt
AU  - C.P. Strong
PY  - 1972
DO  - 10.3133/gq977
UR  - https://pubs.usgs.gov/publication/gq977
ID  - gq977
ER  -