TY  - RPRT
TI  - A three-dimensional geologic framework model of the northern Great Plains region of Montana, North Dakota, South Dakota, and Wyoming, USA
AU  - Leland R. Spangler
PY  - 2026
DO  - 10.3133/sir20265127
UR  - https://pubs.usgs.gov/publication/sir20265127
ID  - sir20265127
ER  -