TY  - RPRT
TI  - Depositional environment of the middle Proterozoic Spokane Formation; Empire Formation transition zone, west-central Montana
AU  - James W. Whipple
PY  - 1980
DO  - 10.3133/ofr801232
UR  - https://pubs.usgs.gov/publication/ofr801232
ID  - ofr801232
ER  -