TY  - RPRT
TI  - Hydrogeology of the Cambrian-Ordovician aquifer system in the northern Midwest, United States with a section on ground-water quality
AU  - H. L. Young
AU  - D. I. Siegel
PY  - 1992
DO  - 10.3133/pp1405b
UR  - https://pubs.usgs.gov/publication/pp1405B
ID  - pp1405B
ER  -