TY - RPRT TI - Hydrogeology of the Silurian and Devonian carbonate-rock aquifer system in the Midwestern Basins and Arches Region of Indiana, Ohio, Michigan, and Illinois AU - George D. Casey PY - 1994 DO - 10.3133/ofr93663 UR - https://pubs.usgs.gov/publication/ofr93663 ID - ofr93663 ER -