TY  - RPRT
TI  - Plan of study for the northern Great Plains regional aquifer-system analysis in parts of Montana, North Dakota, South Dakota, and Wyoming
AU  - George A. Dinwiddie
PY  - 1979
DO  - 10.3133/wri7934
UR  - https://pubs.usgs.gov/publication/wri7934
ID  - wri7934
ER  -