TY  - RPRT
TI  - Groundwater quality in the Cambrian-Ordovician aquifer system, midwestern United States
AU  - Paul E. Stackelberg
PY  - 2017
DO  - 10.3133/fs20173056
UR  - https://pubs.usgs.gov/publication/fs20173056
ID  - fs20173056
ER  -