TY  - RPRT
TI  - Geologic map of the Elk Ridge Quadrangle, Powder River County, Montana
AU  - M.W. McLellan
AU  - W. W. Olive
PY  - 1991
DO  - 10.3133/i2140
UR  - https://pubs.usgs.gov/publication/i2140
ID  - i2140
ER  -