TY  - RPRT
TI  - Geologic map of the Black Butte Mountain quadrangle, Meagher County, Montana
AU  - Laura W. McGrew
PY  - 1977
DO  - 10.3133/gq1381
UR  - https://pubs.usgs.gov/publication/gq1381
ID  - gq1381
ER  -