TY  - RPRT
TI  - Maps of Helena and East Helena quadrangles, Montana, showing areal distribution of surficial deposits and bedrock and location of geological faults
AU  - Robert George Schmidt
PY  - 1977
DO  - 10.3133/ofr77129
UR  - https://pubs.usgs.gov/publication/ofr77129
ID  - ofr77129
ER  -