TY  - RPRT
TI  - Hydrogeology of the basal confining unit of the carbonate aquifer system in the Midwestern Basins and Arches region of Indiana, Ohio, Michigan, and Illinois
AU  - George D. Casey
PY  - 1992
DO  - 10.3133/ofr92489
UR  - https://pubs.usgs.gov/publication/ofr92489
ID  - ofr92489
ER  -