TY  - RPRT
TI  - Plan of study for the northern Midwest regional aquifer-system analysis
AU  - W. L. Steinhilber
AU  - H. L. Young
PY  - 1979
DO  - 10.3133/wri7944
UR  - https://pubs.usgs.gov/publication/wri7944
ID  - wri7944
ER  -