TY  - RPRT
TI  - Measured sections of the Montana Group and equivalent rocks from Montana and Wyoming
AU  - James R. Gill
AU  - Robert E. Burkholder
PY  - 1979
DO  - 10.3133/ofr791143
UR  - https://pubs.usgs.gov/publication/ofr791143
ID  - ofr791143
ER  -